Add terms and date histogram aggregations
Break out aggregation records to their own type; 1.0.3 compatibility with DateHistogramAggregation
fractional interval is no longer a record
remote years,quarters,months; created a couple new functions to make creating aggregations easier.  new date histogram test.
Cleanups, tests, more accuracy to the aggregation api
Merging with master
Export term order / term inclusion constructors
Merge pull request #14 from chrisguiney/aggregations-merge

Add terms and date histogram aggregations