partial supports of advanced settings context+main
https://github.com/globaleaks/GlobaLeaks/issues/249
works continue in receiver preferences
Fix configuration settings to work properly.
completed and cleaned context advaced settings
cleaned submission main
improved and completed receiver prefs and delete/update key
enhanced Admin receiver interface with GPG I/O
fixed view bugs and aligned new REST for admin
Merge branch 'master' of github.com:globaleaks/GLClient into feature/gpg-notification

Conflicts:
	app/templates/default/views/submission/main.html
	app/views/admin/contexts.html
	app/views/admin/receivers.html
Merge branch 'master' of github.com:globaleaks/GLClient into feature/gpg-notification
fixed/supported receiver notification preferences
Merge branch 'master' of github.com:globaleaks/GLClient into feature/gpg-notification
cleared GPG interface and fixed checkboxes behavior
supported mail subject modification by Admin
added translation of receiver prefs+GPG.
update localization
fixed two typos
dirty hack to make translations.js in index.html
fixed tor2web checkboxes for admin UI