Initial work on the new mapped collection and transformation spec.
Various updates.
Minor update.
Minor fix.
Minor optimizations.
Minor fix.
Initial work on the helpers.
Dynamic keys for $set.
$sum and $val also supports bind.
Various updates.
Test runner.
Minor change for the sake of simplification and flexibility.
Spec2 update.
Minor cleanup.
Tests runner rewritten using CoffeeScript for better stacktraces.
It is now possible to ignore items of missing rules.
Loop detection in the helpers.
Minor spelling.
Initial tests for spec2.
Missing files.