new branch for ghc7.6.1
misc edits to 761
Merge branch 'master' of github.com:ucsd-progsys/liquidhaskell into ghc761

move tests/pos/Test0.hs to tests/pos/Test761.hs to fix case-sensitivity conflict

Conflicts:
	Language/Haskell/Liquid/GhcInterface.hs
	Language/Haskell/Liquid/GhcMisc.hs
update Language.Haskell.Liquid.Desugar to match ghc-7.6

compiles, but tons of runtime errors of the form "could not add X to
context: not interpreted"
use hscTarget = HscInterpreted to force interpretation of modules.

needed to update deSugarWithLoc to not add ticks because that will
pollute the AST with breakpoints for ghci
stupid case-insensitive filesystem
add failing test for order of type variables with class constraint.

see tests/pos/tyvar.hs
disregard class constraints in freeTyVars.

GHC appears to do this...
Merge branch 'master' of github.com:ucsd-progsys/liquidhaskell into ghc762

Conflicts:
	Language/Haskell/Liquid/Measure.hs
	Language/Haskell/Liquid/RefType.hs
Merge pull request #55 from gridaphobe/ghc762

update liquidhaskell to use ghc7.6