dropped use of textChat prop in offer/answer messages
Merge pull request #337 from n1k0/remove-textchat-offer-answer-property

Drop use of the textChat property in offer/answer messages
Handle a video media option on the resume message to be able to resume without video
Improve readability and documentation of the call resume functions
Improve ChatApp handling of accept, hold and resume messages
Merge pull request #338 from Standard8/resume_video

Handle a video media option on the resume message to be able to resume without video
Show user is typing message