Support fonts

[Phyks]

cc "L" is a valid Asciimath font command according to their homepage, but is not supported by AsciiMath.

[Phyks]

cc translates into \mathcal which is not the expected render.

It seems it should be \mathscr, but it requires \usepackage{mathrsfs}.

See https://tex.stackexchange.com/a/58124.