Development Alpha 0.17.0

- MIGRATION: create_categories_table
- Created the Administration page for the category listing
- Updated the registration process to no longer use Eloquent but rather
the Laravel query builder
- Created a link to the Expert registration from the customer navigation
if they are not already an expert
- Created the reviews section of the dashboard
- Optimized the Developr Calendar to fit for our needs on the Dashboard
- BUG FIX: Fixed an error in the call to the global DataTables when an
admin is attempting to bring up all the users in the system
- BUG FIX: Corrected an issue where the session groups where not getting
updated if an administrator changed their own groups
- BUF FIX: Corrected an issue where the flash message wouldn't appear
when someone tried to log in with the wrong credentials