message signatures
zs
added e2e-tests
Merged 'dev'.
zs
simple test work, check for authentic signatures added
zs
zs
zs
Merged 'dev'.

Conflicts:
	core/comps/conversations/drtv-message-assets.html
added test for authentic signatures
Merged 'dev'.
replaced text with icons for singing
Merged 'dev'.
fiexed bug concering availability of identity of cmUserModel
Merged 'dev'.

Conflicts:
	test/e2e/advanced/conversation-encryption.3.spec.js
changed css class for message signatures, fixed test
Finish sign-messages