#1 Fix "infinite loops" in quote_highlight & comment_highlight

[Juhika]

Previously quotes that contained a comment token ex:
"//" or "/*" would result in the cbrowser front end
hanging. This was caused by some logic in
quote_highlight that tried to exluding using the quote
color highlighting for quoted strings in comments.

My approach to fixing this problem was to combine
quote_highlight and comment_highlight into one
function. This has the advangtage that we won't need
to check to see if a comment token in found within a
quoted string or visa versa. We should also see a
slight performance improvement in syntax highlighting
since we scan the file once less times.

Please follow up if there are any problems with this
patch since I can't test it with my current
installation of cbrowser since we have other
customization I don't think the general community would
be interested in. I've attempted to cut and paste the
relevent changes into a "clean" copy for ftcllib.tcl.

[Juhika]

ftcllib.tcl updated with new comment_quote_highlight function

[Lluís Batlle i Rossell]

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It still doesn't work on "\\\\".

I was writting the same patch today... It doesn't solve the
"comments in quotes" part, but at least the program never
hangs.

I'll try to attach it, but I think in the future I'll try to
improve your patch.