Travis with no test

[jsaksris]

Add Travis to deepdetect with no test script.

fixing eigen3 problem based on
https://github.com/beniz/deepdetect/pull/276

[beniz]

Thanks. Several things before integration:

• Please squash all your commits into a single one
• Remove the .travis.yml.orig file that seems to be useless
• Can you explain your changes to Cuda.cmake ?
• Could you explain your changes to CMakeLists.txt ? I see hard-coded paths such as /usr/include and I don't think there should be there, unless Travis platforms were complaining in some ways. In that latter case, please update this PR with the Travis error messages.

[jsaksris]

Removing hard-coded paths resolved in following error.
This fix was part of the changes suggested by https://github.com/beniz/deepdetect/pull/276