Improved exception handling during configuration loading
Fixed extension scanning when using a custom theme
New filterValues column attribute (JSP only)

* For now, this attribute allows to pass the name of a Javascript array
containing values used to populate a filtering select box
* Linked with dandelion/issues#144
Resolved conflict with new method findAncestorWithClass method
Refactored Thymeleaf implementation

* column attributes are now in a separated enum
* the staging conf principle has been applied on the Thymeleaf impl
* new AbstractDatatablsColumnAttrProcessor and all column attr
processors updated accordingly
* refactored packages organization
Fixed issue with cssStyle and cssClass

The JSP were missing when using AJAX sources
Improved debug method in BaseIT

the goToPage debug method now directly displays the content of the
generated JS file
Fixed typo in comments
Updated the Column Filtering plugin

* From 1.5.0 to 1.5.1
* Added a fix detailed in
https://code.google.com/p/jquery-datatables-column-filter/issues/detail?id=62
Formatted code and improved logging
Fixed a test (sortDirection)
Fixed bug with null values when using AJAX sources
New way to create column in Thymeleaf

* Added new local variable created for each column
* Cleaned code
Refreshed toString method of ColumnConfiguration
Enabled filtering IT