A quick pass at a non-static version of coGroup.
Added a test for coGroup method equivalence.
Made coGroup equality test more sane.
clean up some imports
all of the non-group stuff works in new lazy format
added simple builder for CoGroup, added more capable builder for GroupBy
bump version number
Merge pull request #9 from square/issue-7

Improve group-by syntax
looks like we need to specify hadoop dep directly now
fix build errors
oops, didn't have .every path for Buffer objects
bump version number
oops, took away toPipe by accident
bump version
clean up imports
build errors
Add "get or else" functionality

- named after scala, fbofw
- no test for Pump function; looked hairy :-(
bump verison
Throw IAE if provided tuple not singleton

And remove some boilderplate.
Merge pull request #10 from smparkes/smparkes/getorelse

Add "get or else" functionality