implemented GridPost; extended WallApp.get_collection for posts
added page / frame class to html element in templates; reset background of display post frame
implemented GridPostElement; added post ID to PostElement's frame URL (display)
fixed: illegal use of Post.create in tests
fixed: broken GridPostElement layout
implemented auto-layout on resize for TextPostElement
fixed: GridPostElement's handling of item deactivation fails pre-deactivation
added activation guard to PyngPost
disabled posting of Collections to other Collections but Wall
enforced posting of Collections only to Wall also for post_new
fixed: GridPostElement zombie event handlers
Merge branch 'master' into grid-post

Conflicts:
	wall/res/static/display.js
reversed activation guard for Pyng
cleaned up
Merge pull request #131 from NoyaInRain/grid-post

Grid post