Add support for Matlab

[XhmikosR]

This fixes #28.

TODO:

• Stream comment should add a new line but take into account the current line endings %{comment%}
• Associate .m files to open with matlab lexer instead of the C/C++ one

[Kongsea]

I think you can build a version not think of MATLAB Stream comment.
Because stream comment is not common.

[SamuelMarks]

Can we merge this?

[XhmikosR]

I don't see any of the TODOs fixed, so no.

[zufuliu]

I have an implementation for TODO 2 at
https://github.com/zufuliu/notepad2/blob/master/src/Styles.c#L1211

[zufuliu]

TODO 1 is implemented at
https://github.com/zufuliu/notepad2/blob/master/src/EditAutoC.c#L1194
and
https://github.com/zufuliu/notepad2/blob/master/src/EditAutoC.c#L1258

@XhmikosR
I can work on the matlab branch to fix the two TODOs after https://sourceforge.net/p/scintilla/bugs/1965/ get committed.

[blackcrack]

#199

[XhmikosR]

@blackcrack: stop doing that, thanks.