README for edge package

There are, unfortunately, a number of complexities and difficulties in the dependency tree, which I think would make it difficult to compile on most platforms. However, it does build on the Debian Jessie release, with ghc-7.6.3 installed:

sudo apt-get install ghc cabal-install libghc-gloss-dev libghc-alut-dev
cabal update
cabal install edge
~/.cabal/bin/edge

If you have already have version of gloss, OpenAL, or GLUT Haskell libraries installed via cabal, you may wish to remove them first with ghc-pkg unregister gloss etc.