Since Piwik does NOT follow PSR-0, composer makes unnecessary file system calls for every single class. Piwik's own autoloader knows how to load Piwik's classes.

Refs #4077, added initial, minimal, new DataTable visualization (Treemap) that uses JavaScript Infovis Toolkit.

Notes:
  - Moved priority of Truncate filter in DataTableGenericFilter so it is executed after a DataTable is limited.
  - Disable queued filters when requesting data in ViewDataTable and execute manually in the post-load function.

refs #4086

Refs #4041, allow all view/visualization properties to be set via query parameter, remove unecessary client side properties from ViewDataTable, move HtmlTable specific client side parameters to HtmlTable, remove code that looks for generic filter query parameters when setting client side parameters, make sure client side parameters are set if they're not false (ie, 0) instead of if not empty and add filter_offset as view property.

Adjust TranslationWriterTest

fixes #4086

Refs #4041, mild refactoring to ViewDataTable, handle max_graph_elements property w/ filter_truncate instead of directly executing filter and fix bug in JqplotGraph's constructor.

now thirdparty translations will be removed

Refs #4041, change filter_limit, filter_sort_column and filter_sort_order to be client side parameters of HtmlTable visualization only so its no longer necessary to disable queued/generic filters for graphs.

Refs #4087, rewrote UI integration tests to use phantomjs or slimerjs and added (disabled) UI tests to travis build config.

Notes:
  * Modified main page-loading JavaScript to use ajaxHelper so it's possible to know when all AJAX requests are made.
  * Add setUrl method to ajaxHelper so it can be used when a doing AJAX w/ a URL instead of an object containing query parameters.

Refs #4041, remove setActiveIcon function from dataTable.js and refactor way footer icons are rendered in _dataTable.twig.