README: remove whitespace, fix hsenv command to be compatible with v. 0.4.
README: remove whitespace, fix hsenv command to be compatible with v. 0.4.

mightymoose/liquidhaskell,rolph-recto/liquidhaskell,Kyly/liquidhaskell,Kyly/liquidhaskell,spinda/liquidhaskell,Kyly/liquidhaskell,rolph-recto/liquidhaskell,mightymoose/liquidhaskell,spinda/liquidhaskell,spinda/liquidhaskell,mightymoose/liquidhaskell,mightymoose/liquidhaskell,abakst/liquidhaskell,abakst/liquidhaskell,Kyly/liquidhaskell,abakst/liquidhaskell,abakst/liquidhaskell,rolph-recto/liquidhaskell,abakst/liquidhaskell,rolph-recto/liquidhaskell,spinda/liquidhaskell,Kyly/liquidhaskell,mightymoose/liquidhaskell,Kyly/liquidhaskell,spinda/liquidhaskell,mightymoose/liquidhaskell,rolph-recto/liquidhaskell,abakst/liquidhaskell,rolph-recto/liquidhaskell,spinda/liquidhaskell