Updates cla_classifier_diff since it didn't get the recordNum update.
Adds unit tests for the diff classifier.
Merge branch 'master' of github.com:numenta/nupic
Adds cleanbuild script for convenience.
Improve clean up in cleanbuild script.
Allow cleanbuild script to be run from other directories.
Merge pull request #104 from scottpurdy/master

Model.load and CLAClassifierDiff tests
Merge branch 'master' into cleanbuild
Merge pull request #107 from scottpurdy/cleanbuild

Adds cleanbuild script for convenience.
Merge branch 'master' into load_model