New Database fields

Have added the Colour and Favourite database fields to the Pill model
Started work to add the favourite button

WIP
Added support for indicating a pill as a favourite

Added new gold colour
Bar added to the left hand side of the pill_list_item that will show if a pill is marked as a favourite
Added long press support to pill ist

The pill list can now be long pressed to access the action bar,
this will allow you to favourite a tweet. This change isn't yet persisted.
Merge branch 'master' into dashboard
Added unfavourite

Included new empty star icon
Added delete button to action bar

This is hidden for now
Can mark a Pill as a favourite now

Added new UpdatePillTask
Refactored DatabaseHelper to amalgamate code from getPill and getAllPills
Refactored pill query to share code
Added GetFavouritesTask
Favourite pills are now added to the dashboard
Merge branch 'dashboard'
Fixed logic error for adding favourites