suggestion: add a .ehs file type

[Alex Jacobson]

Right now I have it automatically add -glasgow-exts unless the user 
explicitly turns it off.  I prefer to have packages that are also cabal 
compatible....  If there is a way to get cabal also to preprocess .ehs 
correctly then we are good to go!

-Alex-

Robin Bate Boerop wrote:
> Alex, Lennart's suggestion makes me think: Why not make SearchPath
> into a preprocessor?  It could recognize a .ehs extension, and then do
> some very simple preprocessing (adds pragmas according to user's
> settings).
>