Misc (re #1751): Fixed unintialized field of pjmedia_transport_info.



git-svn-id: http://svn.pjsip.org/repos/pjproject@4811 74dad513-b988-da41-8d7b-12977e46ad98
Re #1757: Initial implementation of iOS OpenGL ES renderer. To use it, application needs to add:
#define PJMEDIA_VIDEO_DEV_HAS_OPENGL 1
#define PJMEDIA_VIDEO_DEV_HAS_OPENGL_ES 1
#define PJMEDIA_VIDEO_DEV_HAS_IOS_OPENGL 1



git-svn-id: http://svn.pjsip.org/repos/pjproject@4812 74dad513-b988-da41-8d7b-12977e46ad98
Re #1757: Add example to display video in ipjsua (require ffmpeg libraries)



git-svn-id: http://svn.pjsip.org/repos/pjproject@4813 74dad513-b988-da41-8d7b-12977e46ad98