Small fix in IntervalTree.
Merge pull request #3 from cinquin/master

Merging in pull request which called sort _after_ the overlap data.
Make IntervalTreeTests more stringent: check that query results do not contain extraneous items.
Merge pull request #4 from cinquin/master

Make IntervalTreeTests more stringent: check that query results do not c...
Added a size check to the collectionEquals mewthod.
Updated segment tree tests to use collectionEquals() method like the
interval tree uses.
Merge pull request #1 from phishman3579/master

merge