Raised version and updated changelog

Ignore-this: a1d47a9e1a42179307584ff7213df16e

darcs-hash:20140627074529-56b4d-a24022657b0333f421a0c5c97626bae34927fa29
Avoid recompiling the whole PJSIP every time the core is recompiled

Ignore-this: c419446b76a954a95cd1bef1c43a30d7

darcs-hash:20140707151213-56b4d-49e8aaef2abe6a2876103d3bf15b78a8c0ec2981