Implemented quota activity.It uses a fragment underneath to allow easier
modifications in the future.

The the progressbar has a fancy behavior (changes color when running out of space)

Added the resources and colors needed in string.xml and colors.xml
Merge branch 'develop' of github.com:owncloud/android into us21_quota_visualization

Conflicts:
	owncloud-android-library
Merge branch 'us21_quota_visualization' of github.com:owncloudChalmers/android into HEAD

Conflicts:
	owncloud-android-library