[jhc] darcs patch: move selector creation from desugar to r... (and 1 more)

Thu Aug 5 19:12:41 PDT 2010 John Meacham * move selector creation from desugar to renamer, detect multiply defined top level values and report an error properly. Thu Aug 5 19:39:48 PDT 2010 John Meacham * treat () the same as tuples when renaming