Support Configfile comments

This should have been done a long time ago...  These still aren't
great: they're only supported as the first character of a line, but at
least it's something.
Call "scala" "scala", not "c"

This was messing with the code that detects when a language is added
twice.  When I added Scala before C, the loop to detect that a
language was being added twice would look at Scala, see that it's
called "c", and fail.

The fix is quite simple: just call Scala "scala"!
Run chkindent

I forgot to indent my code last time, sorry!