Added activateParticipant and addInvitedParticipant to Conversation
Implemented addInvitedParticipant in Conversation
Implemented activateParticipant in Conversation
Implemented findInvitedParticipant in Conversation
Updated ConcreteChatService inviteUser method to utilize invite methods
Updated InviteController to have an acceptInvite method

ACE-96
Formatted code

ACE-96
Removed blank line
Merge pull request #55 from ualerts-org/createInviteAcceptanceController_ACE-96

Added activateParticipant and addInvitedParticipant to Conversation
- Refactored ConcreteChatService to qualify a subType of InviteMessage
as the domain name of the room being invited to.
- Added confirmation modal to handle invite
- Added onInvite listener to the PageController to handle invite type
messages.
Merge remote-tracking branch 'origin/handlerForInviteMessages_ACE-94' into handlerForInviteMessages_ACE-94

Conflicts:
	org.ualerts.chat.service/src/main/java/org/ualerts/chat/service/api/concrete/ConcreteChatService.java