fixed preview label
fixed https://github.com/globaleaks/GlobaLeaks/issues/703
removed the empty custom_css from packaging
cleaned setup.py from some prehistorical code
added possibility to load and reset custom translations
added a GLSetting.exception variable to track and avoid exception mails storm
fixed https://github.com/globaleaks/GlobaLeaks/issues/705
Merge branch 'devel' of github.com:globaleaks/GLBackend into devel
started https://github.com/globaleaks/GlobaLeaks/issues/701
added missing file: admlangfiles.py
Merge branch 'devel' of github.com:globaleaks/GLBackend into devel
Merge branch 'devel' of github.com:globaleaks/GLBackend into devel
implemented feature https://github.com/globaleaks/GlobaLeaks/issues/700
upgraded Twisted to 13.2.0 and txsocsx to 1.13.0.1
+ ZipStream from https://github.com/SpiderOak/ZipStream
various API handlers uniformed
fixed an UT
various handlers permission fix
implemented https://github.com/globaleaks/GlobaLeaks/issues/708
Merge branch 'devel' of github.com:globaleaks/GLBackend into devel

Conflicts:
	globaleaks/handlers/files.py