Add information about microghc project to README.
Add information about microghc project to README.

nathyong/microghc-ghc,nathyong/microghc-ghc,nathyong/microghc-ghc,nathyong/microghc-ghc,nathyong/microghc-ghc,nathyong/microghc-ghc,nathyong/microghc-ghc