Changed version to 2.3



git-svn-id: http://svn.pjsip.org/repos/pjproject@4913 74dad513-b988-da41-8d7b-12977e46ad98
Tagged 2.3

git-svn-id: http://svn.pjsip.org/repos/pjproject@4914 74dad513-b988-da41-8d7b-12977e46ad98
Changed version to 2.3-svn

git-svn-id: http://svn.pjsip.org/repos/pjproject@4915 74dad513-b988-da41-8d7b-12977e46ad98