[#2210] To remove an irrelevant file
[#2236] add the arrow icon to the 'all researched results'
[#2166]Add function for deleting pending member
[#2250] Reimplemented Iconv with calls to String#encode
[#2166] Fixed a bug in Tanglin's code
[#2210] To remove file .hgignore
[#2067] Change the size of attachments from 5M to 20M.
[#2029] Just replaced two trumpet images
[#2249] Modify the wrong url of members in project system.
[#2268] fix avatar's position to left
[#2235]Optimize the request for pushing notifications
[#376]Make round border for project image
[#2368]Change the position for the textile tips and fix the bug for close icon in wiki page
[#2352] Fix Bug to correct HTML grammer.
[#2351] Fix Bug.
[#2382] fix bug have large members in sidebar
[#2355]Forbid the behavior of deleting creator
[#2138] when create/edit the isssue description, user can copy and paste file.