all manners of new tests
removed build section that didn't work (direct from whirr repo); added info on resource files needed to run test; tweaked whirr config section to match current requirements; changed cluster-start section to reflect fact that we're starting multiple instances; other minor edits
Merge branch 'master' into igalDruid
fix one of the TODOs and add test case
Merge branch 'master' into more-tests
Merge pull request #604 from metamx/more-tests

All manners of "new" tests
Merge pull request #617 from metamx/igalDruid

Igal druid
Approximate Histogram Module

docs