Scripts for building pjsip environment for host machine

1. Place pjproject-2.4.tar.bz2 in repo folder (archieve could be obtained here http://www.pjsip.org/release/2.4/pjproject-2.4.tar.bz2).
2. Run ./build_pjproject.sh to extract archieve and build it
3. Run make to build simpleua

Just run simpleua with address of remote sip client, for example:

./simpleua sip:test@192.168.1.128