add some rtc code

cannot work
daily commit 2014/10/12

Signed-off-by: ggxx <ggxx120@gmail.com>
Added a simple rtcpeerconnection client
Added screen-sharing function
daily commit 2014/10/14

Signed-off-by: ggxx <ggxx120@gmail.com>
daily commit 2014/10/15

lots of shit......
updated index page div-css
daily commit 2014/10/15b
Added some css, still ugly...

Signed-off-by: ggxx <ggxx120@gmail.com>
First available version, cheers~
Merge pull request #1 from ggxx/rtc

Single p2p is OK