#173 DomainStatsData interface
#173 H2DomainStatsData and H2DomainStatsDataTest
#173 H2DomainStatsData.all()
#173 Refactored DefaultResource to use DomainStatsData
#173 Added puzzles
#173 Code review updates and some formatting changes
Merge pull request #177 from carlosmiranda/173

#177: pull request #173 Post metrics to local database to minimize CloudWatch API accesses