Don't use .fit() for avatar image in FriendList

Using fit here may cause wrong aspect ratio (if the avatar image is not
quadratic).
Gradle update and optimisation

Updated Gradle to 1.12 and the Android gradle plugin to 0.10. Now
Atarashii can be built again without troubles (with the latest Android
Studio 0.5.8). Also done some optimisations to the gradle config:
- defined things required for all modules in the root build.gradle
- kept the wrapper tasks in the build.gradle files for easier update
  in the future
Fix Friendlist item layout mess-up with large text

- list items are now resized if neccessary
- moved username into the LinearLayout that contains the last online/
  friends since dates
- profileImg is centered vertically if list item is resized
- use layout_weight for center LinearLayout to prevent the status bar
  from floating out of the view
Merge pull request #166 from d-sko/friendlist_fix

Friendlist fixes
Merge pull request #165 from d-sko/gradle_update

Gradle update and optimisation (also fixes Android Studio building)
Profile: Moved Friendlist, add History & Tabs.