Rewrote gradient descent to use Apply for scalar matrix multiplication.
Merge pull request #100 from pontusmelke/use-apply

Rewrote gradient descent to use Apply for scalar matrix multiplication.
Have to carry on like this for every Attribute
Most of the major Attributes covered
Documentation
Serializing out...
DIMS write-out
Getting closer
base: More general version of equality
Serialization works
Stabilizing things
Documentation
Added CSV export
Revised version works!
ARFF tests passing
ARFF doesn't actually support binary Attributes
Kind of hacky ARFF reading
Hack ARFF serialization