Merge branch 'release2.0.1' into development
add developer dependencies
update to work with 'socket.io v1.0'
fix not passed tests
add icon to 'share' button
improve javascript code
wrap main function in anonymous function
improve indentation and readability
update to 'socket.io v1.0'
remove Caller class
update tests
add icons to all buttons
add some border to the images
simplify css selector
set default values
fix old style code
allow call only when both peers are in the room
alert when it is possible to call
fix equality
error handling when joining a room