Support for C/C++ and Bash syntax highlighting

Hi Lea,
This adds support for C/C++ and Bash. I reused some of the css classes instead of defining new ones. I am not sure if that's the right way to do it...

C-Like is missing a lot of the keywords and some of the operators for C, but since it is the base for some of the other languages I thought it woud be best to make a new language C. C++ has even more keywords and operators.