Enchance support TeX Magic comments

[ashthespy]

Currently the package supports the TeX root magic comment, and should be enhanced to support other comments such as compiler (#154) and JobName (#151) comments.

[laurentperrinet]

I found this post as a "reference" for the different types of magic comments:

https://tex.stackexchange.com/questions/78101/when-and-why-should-i-use-tex-ts-program-and-tex-encoding

which is also summarized in https://github.com/TeXworks/texworks/wiki/Magic-Comments

In particular a useful feature is to have a
% !BIB program =
directive as sometimes you are forced to biber while otherwise bibtex (and vice versa)