Added empty files for trying out matrix multiplication
More shell scaffolding
More work on matrix multiplication
Done with the implementation and unit testing

Now to see if this actually works...
Fixing some bugs, added some debugging stuff
Added edgesToExclude and maxFanOut to PathMatrixCreator

edgesToExclude lets you not follow training and testing edges during walks, so that you're not
cheating.  maxFanOut lets you control the size of the feature matrix that is produced - if a path
feature has too many targets per source, it is discarded as not useful.
One more attempt at edgesToExclude...
Making matrix creation the default, now that it's working
Spacing in PathFinderTest
Updated the README, and added a test
Fixed a couple of issues when using non-standard experiment configurations
Fixed some tests, added a new one
Working on a synthetic dataset generator
Fixed some bugs in ExperimentScorer when experiments are running
Merge branch 'matrix-multiply' of https://github.com/matt-gardner/pra into matrix-multiply
Removed onlyExplicitNegatives, minor updates to PathMatrixCreator
Better DatasetCreator, but still needs work
Merge branch 'matrix-multiply' of https://github.com/matt-gardner/pra into matrix-multiply
Added significance testing to ExperimentScorer
Working on relation metrics display