Not working propagate
Merge branch 'develop' of github.com:twitter/scalding into feature/optimizedmatrix
Column propagation seems to work
Changed Longs to BigInt
Added a note for Monoid/Ring confusion in propagate
Added a comment for the last case in optimize
Removed sumColVectors from propagate and changed Ring to Monoid
Added a simple row L2 normalization
Removed the unchecked warnings from Matrix2OptimizationTest
Added the zero filter to propagate
Added TODOs
filtering out zeroes in binarizeAs
Changed all toTypedPipe to lazy val to be sure
Added the (A*B) + C with two map/reduce ops optimization
Moved the joining to toOuterSum
reverted toTypedPipe override in MatrixLiteral
toOuterSum is lazy val
Polished the Matrix2Test (TypedTsv writing, no Pipe conversions)
Extracted a joining choice into one common method
Merge pull request #557 from tomtau/feature/optimizedmatrix

Feature/optimizedmatrix - One Column + graph propagation, L2 normalization, (A*B)+C optimization