Simplified the configuration processors
Now all processors extends the same processor: AbstractConfigurationProcessor. This allowed to removed code duplication and especially to handle in one place the case of processor that accept the recently added syntax for manipulating Dandelion scopes.
The AjaxReloadFunctionProcessor now accept the special syntax.
Custom sort types can now be used in the sortType / dt:sortType column attribute. Closes dandelion/issues#165
Updated all tests accordingly
Renamed some attribute processors to be more consistent with the JSP taglib