Enabled CppCheck checking in travis configuration.

Signed-off-by: Lukasz Gromanowski <lgromanowski@gmail.com>
Added  cppcheck --help in travis configuration for debug purposes.

Signed-off-by: Lukasz Gromanowski <lgromanowski@gmail.com>
Enabled cppcheck in travis configuration.

Signed-off-by: Lukasz Gromanowski <lgromanowski@gmail.com>
Check sources only in src, and test directories.

Signed-off-by: Lukasz Gromanowski <lgromanowski@gmail.com>
Merge pull request #61 from lgromanowski/travis

Enabled CppCheck checking in travis configuration.