Integrates cpplint as a target and a series of tests

This fork aims at integrating cpplint (open source lint-like tool developed by Google, designed to ensure that C++ code conforms to Google's coding style guides) the same way it was done for cppcheck.

- [x] tested on a small project

Known issues:
- what should be the default cpplint options? Should they be customizable by means of CMake variables?
- tests are not working (similar to issue cppcheck's issue #148 )

Got it. I should read the docs next time. We certainly need a white-card option which can be set beforehand by a project