pkg/kamailio: Initial Travis CI configuration

Initial configuration that integrates Travis CI infrastructure for Kamailio project

[![Build Status](https://travis-ci.org/kamailio/kamailio.svg?branch=vseva%2Ftravis)](https://travis-ci.org/kamailio/kamailio)

- gcc and clang builds
- notifications by email and IRC
- environment based on Ubuntu 12.04 LTS(precise)

TODO
- configure basic testing after built
- build with valgrind
- ...

https://travis-ci.org/kamailio/kamailio