Rename image.py into imaging.py to avoid namespace conflicts.
Remove mimerender.py which is not used by anything.
pulldown fix: hide "Loading" icon when server return failed
Merge branch 'master' of git.oschina.net:luohao-brian/phonecms
Dispatch uploaded files according to their mimetypes
Merge branch 'master' of http://git.oschina.net/luohao-brian/phonecms
Replace DEFAULT_PER_LOAD_NUM with COUNT_PER_PAGE