FileLister::RecursiveAddFiles failed to compile in Windows when GUI was compiled. Since that method wasn't used in Qt build I ifdeffed it out. Also removed vcl related code from checkdialog since that was removed from release.
Only adds proper (.cpp,.c,.cpp,...) files to the list of files to check. Modified checkthread to clear results after each file.
Added tr to all strings.
Also modified astyle scripts to format gui code aswell.