Adds:
ENABLE_UI (on by default) which makes it so that the UI is required, and
will fail if a dependency is not found.  This is on by default because
most people are building it with the user interface, and we'll probably
get a lot of issue reports stating "why is there no executable?" if we
don't have this on by default.

DISABLE_UI which forces the UI off.

If neither are set, then the UI will only be built if the dependencies
for it are found, otherwise the UI will be be ignored.

Completely removes the build dir in favor of cmake based build layouting

The status bar now displays:
 - Auto-reconnect information (reconnecting and reconnect success)
 - Dropped frames (as well as percentage of total video frames)
 - Duration of session
 - CPU usage of the program
 - Kbp/s

The OBSBasic class is getting a bit big, so I separated out the
status bar code to its own class derived from QStatusBar.

So, scene editing was interesting (and by interesting I mean
excruciating).  I almost implemented 'manipulator' visuals (ala 3dsmax
for example), and used 3 modes for controlling position/rotation/size,
but in a 2D editing, it felt clunky, so I defaulted back to simply
click-and-drag for movement, and then took a similar though slightly
different looking approach for handling scaling and reszing.

I also added a number of menu item helpers related to positioning,
scaling, rotating, flipping, and resetting the transform back to
default.

There is also a new 'transform' dialog (accessible via menu) which will
allow you to manually edit every single transform variable of a scene
item directly if desired.

If a scene item does not have bounds active, pulling on the sides of a
source will cause it to resize it via base scale rather than by the
bounding box system (if the source resizes that scale will apply).  If
bounds are active, it will modify the bounding box only instead.

How a source scales when a bounding box is active depends on the type of
bounds being used.  You can set it to scale to the inner bounds, the
outer bounds, scale to bounds width only, scale to bounds height only,
and a setting to stretch to bounds (which forces a source to always draw
at the bounding box size rather than be affected by its internal size).
You can also set it to be used as a 'maximum' size, so that the source
doesn't necessarily get scaled unless it extends beyond the bounds.

Like in OBS1, objects will snap to the edges unless the control key is
pressed.  However, this will now happen even if the object is rotated or
oriented in any strange way.  Snapping will also occur when stretching
or changing the bounding box size.

Added github gist API uploading to the help menu to help make problems a
bit easier to debug in the future.  It's somewhat vital that this
functionality be implemented before any release in order to analyze any
given problem a user may be experiencing.

Add a 'source selection' dialog to replace the 'enter a name' dialog.
This new dialog allows you to make new instances of pre-existing sources
so that you can add a pre-existing source to a different scene, or in to
the same scene more than once.

Also started implementing locale.

Comtemplating switching to JSON-based locale later, so we can add things
like descriptions/disambiguation, and so we can use jansson's built-in
hash table when doing the string lookup.

 - Add volume control

   These volume controls are basically nothing more than sliders.  They
   look terrible and hopefully will be as temporary as they are
   terrible.

 - Allow saving of specific non-user sources via obs_load_source and
   obs_save_source functions.

 - Save data of desktop/mic audio sources (sync data, volume data, etc),
   and load the data on startup.

 - Make it so that a scene is created by default if first time using the
   application.  On certain operating systems where supported, a default
   capture will be created.  Desktop capture on mac, particularly.  Not
   sure what to do about windows because monitor capture on windows 7 is
   completely terrible and is bad to start users off with.

 - Add a properties window for sources so that you can now actually edit
   the settings for sources.  Also, display the source by itself in the
   window (Note: not working on mac, and possibly not working on linux).

   When changing the settings for a source, it will call
   obs_source_update on that source when you have modified any values
   automatically.

 - Add a properties 'widget', eventually I want to turn this in to a
   regular nice properties view like you'd see in the designer, but
   right now it just uses a form layout in a QScrollArea with regular
   controls to display the properties.  It's clunky but works for the
   time being.

 - Make it so that swap chains and the main graphics subsystem will
   automatically use at least one backbuffer if none was specified

 - Fix bug where displays weren't added to the main display array

 - Make it so that you can get the properties of a source via the actual
   pointer of a source/encoder/output in addition to being able to look
   up properties via identifier.

 - When registering source types, check for required functions (wasn't
   doing it before).  getheight/getwidth should not be optional if it's
   a video source as well.

 - Add an RAII OBSObj wrapper to obs.hpp for non-reference-counted
   libobs pointers

 - Add an RAII OBSSignal wrapper to obs.hpp for libobs signals to
   automatically disconnect them on destruction

 - Move the "scale and center" calculation in window-basic-main.cpp to
   its own function and in its own source file

 - Add an 'update' callback to WASAPI audio sources

You have to use qt5_use_modules otherwise it just won't always work.  I
don't know how it was working before with cmake, but apparently this
does the trick to ensure that all the necessary libraries and includes
are added.  ..Might require cmake 3.8.9 though.  ..I do hope that
doesn't end up being a problem.

* Not entirely sure if this will fix it, johnnypatterson claimed it
  would, but this checked out on my mac so at the very least I don't
  think it should hurt anything

Neglected to add the new files (window-settings-basic.*) to cmake.

CMake now works on all platforms

add move constructor to wx connector class, add simple connector list class, add initial video settings class, update build files

fixed locale code, added locale files, made wx use locale files, fixed some bugs, and added platform-specific files to the main program