Added Travis-CI config file.
This should fix the dependencies in the Travis-CI config.
Added the tests to the Travis-CI config.
Removed a few extra cmake files.
Merge branch 'master' of https://github.com/libcoin/libcoin.git into remove-extra-cmake-files-upstream
Merge branch 'master' of https://github.com/libcoin/libcoin.git into remove-extra-cmake-files-upstream
Merge pull request #65 from JeremyRand/travis

Travis-CI testing