text message sent/receive
Merge branch 'feat-conversation' into feat-privatelink
add senderNeed property to collected events with text messages
bug fix for notification count for requests

remove addEventAsUnreadEvent when reacting to the open sent event
conversation directive

- chat messages as custom directive
Merge branch 'feat-conversation' into feat-privatelink

Conflicts:
	webofneeds/won-owner-webapp/src/main/webapp/app/private-link/private-link.html
send text message

- text message send button functionality
- sending textmessage
- receiving text message
- text message icon gets selected depending on the sender need.