Multiple changes and enhancements to CQL Execution Engine:
1. Enhanced support for uncertainty calculations in DateTime and Interval
2. Added support for IncludedIn and Overlaps to Interval
3. Support three-valued or, and, not
4. Refactor DateTime and Interval tests
5. Update to latest grammar and ELM changes
6. Add support for debugging tests with node-inspector
7. Use FindBugs 3.0.0 to support Java 8