Allow a (hidden undocumented) key to m.login.recaptcha to specify a shared secret to allow bots to bypass the ReCAPTCHA test (SYN-60)

This uses the ignoreSynchronization flag because of the longpoll on the event
stream. It would be better to use $interval, but couldn't get that to
*reliably* work when testing. I suspect that $interval won't help us here,
since there is genuinely an open $http connection, as we're doing a long
poll. https://github.com/angular/protractor/issues/49 for more info.

Added an 'id' to the login button so it can be automatically triggered.
Also, added an onPrepare section to protractor.conf to do the login.

The environment file is .gitignored so random selenium servers aren't accidentally pushed.

Added boilerplate for running end-to-end tests.\nThis is done using Protractor, which looks for a .gitignored file environment-protractor.js which contains the selenium endpoint url.

remove the ng-model attribute from mainInput textarea to stop the digest being run every time you press a key (SYWEB-4)

SYWEB-14 #resolved

SYWEB-55 #resolve

Fix the "is webrtc supported" titles on buttons and make the video / voice call buttons appear in multi-user rooms but be greyed out with approriate titles.

Conflicts:
	webclient/room/room.html

SYWEB-13 SYWEB-14: disabled "Call" button if the browser does not support all required WebRTC features

Internet Explorer case: Launch the app only for versions 9 and higher.

SYN-47 #resolve

Fixed SYWEB-16: When sending an invite over federation, the remote user sees the name of the resulting invite room as *their* name rather than the inviters