Improves abstract catalog html client implementation
Removes counting for the available attributes

The functionality is moved to the catalog/count html client
Adds current filter parameters to category links
Adds new catalog count html client for faceted search counts
Enables search filter client and creates links to retrieve counts for faceted search
Improved CSS for catalog filter html output
Removes old method for retrieving the category IDs
Merge pull request #428 from nsendetzky/2014-01-13_faceted-search

Adds category counts to catalog filter and optimizes performance of faceted search