Added git URLs to README.
Added git URLs to README.

roidayan/rtslib,Datera/rtslib,mikenawrocki/rtslib-fb,roidayan/rtslib,Datera/rtslib,cvubrugier/rtslib-fb,agrover/rtslib-fb,mikenawrocki/rtslib-fb,JonnyJD/rtslib-fb