Added inferior-julia comint mode

[Elzair]

I added a comint-mode for julia. Now, one can run the Julia interpreter in Emacs with M-x inferior-julia

[Elzair]

I have also changed the input mode for the Julia buffer to TeX, so it can now do TeX formatting.

[pao]

cc @Wilfred

[Wilfred]

It might be nicer to use defcustom here, what do you think? I'd also suggest just using "julia" rather than hard-coding the path.

[Wilfred]

Thanks, this is really good! Left a few minor comments, let me know what you think/whether they make sense :).

[Elzair]

I like the suggestions. I enabled julia-mode unicode input in inferior-julia-mode, changed both julia-file-path and julia-arguments to customizable variables (under the group "Julia" in "Programming->Languages"), removed the absolute file path in julia-file-path (renamed to julia-program), and finally changed the buffer name to *Julia*

[Wilfred]

It's still probably worth adding an autoload cookie so users can call M-x inferior-julia without being required to write (require 'julia).

Anyway, this is really good thing to have in julia-mode.el 👍

[Elzair]

Okay, the autoload cookie has been added

[Elzair]

Does everything look good?

[pao]

@Wilfred I'm merging since it looks like this addresses your comments. Feel free to follow up if I've ruined everything.

[Wilfred]

Marvellous, I was about to ask you to merge it. Thanks :)