Add support for Travis-CI

Add basic support for travis CI. After merge this into master please login to https://travis-ci.org/ with github and turn on support for this repository.

It is building against scala 2.9 and 2.10 (2.11 is not supported by scalatest) and oracle-jdk7, openjdk7 and openjdk6 but on that last exists some compilation error on misc subproject.