ArnoldC for Atom

[illuminance]

Just put this together to add ArnoldC syntax highlighting in Github's Atom text editor: https://github.com/illuminance/atom-language-arnoldc

Additionally, when I worked on this, I ran into a problem because the only type is a 16-bit signed int (ProjectEuler needs at least a 64-bit int I think). Is there any way a long (long) data type could be implemented? I really don't know how complicated that is.