Updated README with Jaxl feature list and Issue Tracker, Developer Mailing List links
Updated README with Jaxl feature list and Issue Tracker, Developer Mailing List links

Alanaktion/JAXL,juliusza/JAXL,jayswalvishwas/jaxl,ajmalmsali/JAXL,frost-nzcr4/JAXL,jayswalvishwas/jaxl