[Build] Added Travis CI build script
[Build] Silence apt-get update
[Build] run autogen.sh for Defines.cs
[Build] Install all build-deps of smuxi
[Build] On Ubuntu 12.04 (precise) we have to use dmcs instead of gmcs
[Build] Removed obsolete Packages project files
[Frontend-STFL-Tests] Don't require a specific NUnit version