merged from master

added a check for IE10 and less as it doesn't support video.

changed the connection string to use the SQL DB rather than a local DB

few scope fixes
updated some tests
fixed an issue with chrome where even if the user was to allow access to the webcam, the error callback with Permission Denied error was be called preventing the user from using their webcam
added logic so that once a user adds a friend, the link is created for the two parties at the same time
fixed issue with retry call and added tests
Merge pull request #56 from denisstepanenko/denis1

Denis1
fixed merge conflict