Fixes: 2879174 and 2879294. Also improves a bug to C3 and Google that made it so that attachments were displaying the wrong chart type.

Add an example module for people wanting to understand how to use the Charts module without making use of Views. Also fixes small issue with X-axis title in Highcharts.

This commit takes all sub-module-specific code out of the core charts module, making the module more extensible. It also improves the libraries.yml files and removes unused code from various parts of the site.

add default configuration form to Config page, fix the link to add a new view, and minor pareview fixes, particularly short syntax for arrays

Charts can accept 'create secondary y-axis' option from Chart Attachment displays. This commit also removes a bug in Charts Google that led to duplicate empty fields.

This reverts commit 31a47799.

Initial commit of the new 2.x branch of Charts. Full porting to D7, new Google Charts and Highcharts support. Expanded docs and API support.

* Initial Port to Drupal 7

* Functions moved from one file to other in order to improve performance

* [#461660] by kenorb and brmassa: 'set default settings for charts' instead of 'access administration pages' access

* charts.admin.inc will deal with admin pages and form generation while charts.inc will deal only with common chart building routines
* _charts_settings() should be used instead variable_get('charts_settings') because it might initialize null variables
* _charts_settings_form() is now a separate function that might be used when a module wants to set custom settings for a given chart instead the defaults

* If there is no default chart provider or chart type select, now uses the first one enabled by default.

API Changes:
* The new hook_chart_types() set new chart types (like "Vertical Bar 3D")
* The '#types' on hook_charts_info() now only list the chart type code.

* #426438 by brmassa: If the chart data is missing the provider file, it must not end as an error

Internal:
* 0 errors or warnings on Coder module

* #333918 by brmassa: Fatal error: Call to undefined function: () in /var/www/.../charts/charts.module on line 79

* #323881 by Pasqualle and brmassa: Views 2 integration

* Alert users when the Charts module default settings were not yet set.

* Dont crash or point errors when the default plugin was not yet defined

* Dont crash or point errors when the default plugin was not yet defined

* Some modifications on hook_charts_info. now it returns all info without the need of an operator

* hook_chartsapi renamed to hook_charts_render

* hook_chartsinfo renamed to hook_charts_info

* Converting all files to UNIX end-of-file

* Some Drupal code compliance fixes

* Apply the correct color value intochart data

* Color module integrated and some fine tunning