implemented API for static file management https://github.com/globaleaks/GlobaLeaks/issues/64
Merge branch 'master' into feature/thumbnails
Merge branch 'master' into feature/thumbnails

Conflicts:
	globaleaks/handlers/files.py
	globaleaks/rest/api.py
	globaleaks/rest/errors.py
	globaleaks/settings.py
implemented GL Logo and Receiver portrait: https://github.com/globaleaks/GlobaLeaks/issues/64
fixed little mistakes
added random portrait for receiver at creation
added globaleaks default logo
better order checks at startup
Merge branch 'master' of http://github.com/globaleaks/GLBackend

Conflicts:
	bin/startglobaleaks
added 'admin' auth checks + Merge branch 'master' into feature/thumbnails

Conflicts:
	globaleaks/settings.py
	requirements.txt
implemented unitTest for portrait functions
added checks for unmet pip requirements using a basic versioning system.
trying to fix a bug happening with GLClient features/staticfileupload
Merge branch 'master', solved conflict, handled error outside pyenv
Merge branch 'master' into feature/thumbnails

Conflicts:
	bin/startglobaleaks
Merge branch 'feature/thumbnails' into feature/cleaning

Conflicts:
	bin/startglobaleaks
	globaleaks/utils.py
used a timezone frendly hours initialization, stared unitTest for cleaning.