restored GPG in GLClient: https://github.com/globaleaks/GlobaLeaks/issues/187
added the default value for receipt_regexp=[A-Z]{4}\+[0-9]{5}
customization message https://github.com/globaleaks/GlobaLeaks/issues/418
modify starting page with https://github.com/globaleaks/GlobaLeaks/issues/416
Merge branch 'devel' of github.com:globaleaks/GLClient into devel
completed Admin UI for https://github.com/globaleaks/GlobaLeaks/issues/416
Merge branch 'gpgrestore' into devel

Conflicts:
	app/views/admin/receivers.html
enhanced admin view for https://github.com/globaleaks/GlobaLeaks/issues/187
fixed regexp_receipt (missing escape for backslash)
fixed tor2web security settings configuration
.travis.yml aligned to GlobaLeaks repository
Fix bug in language selection switching

https://github.com/globaleaks/GlobaLeaks/issues/452
fixed a bug related to checkbox in receiver preferences
removed multipart encoding from form configuration
english sentence corrected
fixed PGP receiver preferences view
Fix styling bugs introduced in previous commits
Only display language selector if more than 1 language is available
Merge pull request #72 from globaleaks/issue/365

Pull request for devel branch + issue/365