Fix #155104 by Scott Falconer: Add "Zoom to cluster area" support.

Allow falling back to the default Clusterer marker if desired.

Allow entering larger numbers in some marker manager settings.

Allow choosing between the original and the new "zoom to marker area" behavior on Clusterer.

This file needs some serious work still, it will definately need the most work before dynamic bootstrapping works.

(Header changes only.)

== -> === changes.
Remove unused variable.
Dot notation.

(Header changes only.)

== -> === changes.
Remove unused variable.

== -> === changes.

Remove unused variables.

== -> === changes.
There's still work to do here.

Integrate some of bevan's mods into marker.js.

Fix unguarded for in.

== -> === changes.

Make getMap a bit more user friendly by allowing passing widget ids.

JSLint part 2: == -> === changes, dot notation changes.

Add shape clickability.

Keep track of a per-map storage handler variable. It can be accessed if needed by adding a second parameter to the callback function.

Brown paper bag fix. I broke hyphenated mapids back in September and it took me this long to notice.

* Remove references to mousewheel.js, clean up variable.
* Add support for Continuous Zoom, enabled by default.
* Add behavior flag for disabling Continuous Zoom.
* Remove workaround from may 2007 (rev 1.1.2.15) that was causing zooming problems.

* Add style keyword to the macro layer.
* Add code to merge styles in properly.
* Allow using references to styles in lines / polys.