Added Adminhtml category selector
Mysql4 > Resource
Added deprecated warnings, fix some variables to camelCame
Move category and store config to separate tables
~WIP: Saving categories and store_ids
Page title Adminhtml
B: Category checks were missing
Form labels more clear and hide category_id field
Cleaned up forms
Frontend functionality
Added indexes to attributes table
Load attributes data on layered landing load
Refactored addStoreFilter, addCategoryFilter and added addAttributeFilter to layered landing collection.
FEAT: Load layered landing data on category load for filter pages.

TODO:
- Set the correct canonical
- Test performance (added indexes where possible, but the filter query does a lot of joins of the attributes table.