Auto-import prelude
Use import info in operator desugaring
Fix tests that shouldn't import prelude
Merge branch 'master' into auto-prelude

Conflicts:
	src/Language/PureScript/Sugar/Operators.hs
Merge Operators.hs
Update some tests
Auto-import prelude now working properly
Merge pull request #303 from garyb/auto-prelude

Auto import prelude