RTSPPlayer update: a fix for ONVIF supports provided by the previous version

2.0 (2013/5/1) svn 68
a. I got some feedback these days telling me that he/she can view nothing but a black screen after
requested a stream. this version is a fix for it.
b. I also added an asynchronous message handler
to accept NDK library’s socket connection status callback for RTSPPlayer. you can view the implements
from here: http://rg4.net/archives/762.html
c. Removed ONVIF support temperary because lack of device for test, but you can still try windows version
of ONVIFPlayer for test if you need. http://rg4.net/onvifplayer