Trying to reimplement RangeSet using TreeSets for O(log(n)) behavior
Rewritten RangeSet to use Scala's TreeSet. Still slow.
Specialized implementations of Interval/RangeSet for efficiency
Rewritten Delta and updated ProblemCompiler. Is it still the same?
Various debugging and optimization
Debugged deltas: constraints that were added and removed in the same Compiler were still considered

Additional tests for ProblemCompiler