Eliminate warnings. You need move to latest Nemerle version to compile this revision.
Merge remote-tracking branch 'origin/hardcase_work' into RecoverAllWays
Switch off debugging.
Fix assert.
Work on operators folding.
Improve error messages.
Work on error messages.
Fix a bug.
Add support of Arity & OperatorInfo in symbol. Fix operator folding in error messages.
Merge remote-tracking branch 'origin/RecoverAllWays' into hardcase_work