fixed some stuff
Fix sidebar on short rcos pages.
Fix RCOS slideshow buttons in Firefox
Added spring 2011 poster session
Merge branch 'rcos' of git://github.com/NateStedman/Observatory into rcos

Conflicts:
	observatory/urls.py
Add Spring 2011 group photo
Add Chris Welty's Watson talk
Merge branch 'master' into rcos
Merge branch 'rcos' of git://github.com/NateStedman/Observatory into rcos
Add link to talks sign up form
Merge branch 'master' into rcos
Merge branch 'rcos' of git://github.com/NateStedman/Observatory into rcos
Add talk sign up to urls.py
Merge branch 'rcos' of git://github.com/NateStedman/Observatory into rcos
Improved usability of buttons on the homepage slideshow
Fixed modifying posts bug
Merge branch 'master' into rcos
Merge branch 'master' into rcos
Merge branch 'rcos' of git://github.com/NateStedman/Observatory into rcos
Publicity for Moboile Notifier in end gadget gizmodo and Boygenius