Replaced URIs to point out to GitHub.

Author: achaloyan

docs/mainpage.docs

@@ -64,7 +64,8 @@ The project encapsulates SIP, RTSP, SDP, MRCPv2, and RTP/RTCP stacks and provide
 - <a href="http://www.unimrcp.org"> Website </a>
 - <a href="http://www.unimrcp.org/downloads"> Downloads </a>
 - <a href="http://www.unimrcp.org/documentation"> Documentation </a>
-- <a href="http://code.google.com/p/unimrcp/issues/list"> Issue Tracker </a>
+- <a href="https://github.com/unispeech/unimrcp"> Code Repository </a>
+- <a href="https://github.com/unispeech/unimrcp/issues"> Issue Tracker </a>
 - <a href="http://groups.google.com/group/unimrcp"> Discussion Group </a>
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