Fix issue reported at https://groups.google.com/forum/#!topic/webrtc-everywhere/Od8ezlwpPBI
Adds support for x64 (Windows)
Change Windows setup:
 - to register the ActiveX under HKCU
 - to install binaries under AppData folder instead of ProgramFiles
 - to bundle 32bit and 64bit binaries
Merge branch 'master' of https://github.com/sarandogou/webrtc-everywhere
Remove ".gitignore" file added by David