enable multi language analsysis

Signed-off-by: Jorge Costa <jorge.costa@tekla.com>
Small refactoring: inline CxxPlugin:isEnabled()
Fix file ending.

Files got commited to Git with CRLF (windows) file ending, causing issues on
linux.
Merge pull request #141 from Typz/crlf

Files got commited to Git with CRLF (windows) file ending, causing issues on
linux.