Allow removing of followed projects and authors

Previously swiping was used to remove watched items, however
since ViewPager steals all click actions something new was needed.
Cards that represent the stalking of a project/user have a " X "
button users can use to remove the stalking quality when they
no longer care about a project/user.

PS2: Remove redundant linear layout
PS3: Remove unneeded drawable
   : Fix create on date in ProjectCard

Change-Id: Icf19608a2ec9e4bfcc827cf14b00613cf981d149