cat LastTest.log in case of error on travis

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Add travis status image to Readme

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Another try to use env on travis for versions

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>