addressed issues https://github.com/globaleaks/GlobaLeaks/issues/890 and https://github.com/globaleaks/GlobaLeaks/issues/761
completed UI for configurable terms and conditions
implemented https://github.com/globaleaks/GlobaLeaks/issues/885
addressed issue https://github.com/globaleaks/GlobaLeaks/issues/893
updated requirements
minor CSS corrections