edit error information

"...your compute." to "...your computer."
modify poll_compare display style

remove the useless div border
modify sub page

clear form content and error information when close the sub page
people searching
dashboard bug fix
Access resource library modify
global access resource library modify
people
Merge branch 'lvzh' of https://github.com/EduPepperPDTesting/pepper2013-testing into www0
Merge branch 'victor' into www0

Conflicts:
	lms/templates/dashboard.html
Merge branch 'wangxin' into www0