Adding VHDL comment support

[dnotq]

Not really an issue, but I did not see any place to make a feature request. Please add support of VHDL source files. There is only one comment style in VHDL, --, for example:

-- This is a comment, and mstaks are not seen by SpellRight... :(

This is exactly like the // in C. etc. In fact, if I do this in my VHDL files:

--// This will be seen by SpellRight, and mstaks will be found.

Then SpellRight will work. But that would be a lot of extra noise in the files (and a lot of change to an existing codebase).

It would be nice if SpellRight exposed the comment_start, comment_end, comment_line parameters as per-language configuration. This might allow supporting more languages without code changes, in cases like this where it appears the only thing stopping the spell check from working is the comment token parsing.