[#2089] change sidebar border
[#2089] project display, home, all projects, all members, Me ui modify
[#2031] Fix Bug, if delete a member from a project, then all of associated pending member_invitation will be dealt with at the same time.
[#1690] display problem
[#1690] make popup height fixed and fix bug one picture switch
[#2086] fix bug about pop-up
[#742] The title of wiki can be edit
[#1690] picture switch on issues list latest
[#1929] finished fragment cache for issue page
[#1929] finished object cache for side bar
[#1929] finished counter cache for project-issue
[#1716] modified the css of project system's search result page.
[#1716] more modifications of the css.
[#1690] fix picture and arrow vertical-align
[#1973] Fix bug about we can change project when we create a new issue.
[#2035] change the delete icon, and the copywritting of comfirmation box.