Adding back OS X to build matrix.
Tweaking OS X build scripts.
Split swarming tests out of integration tests.

Build is now running integration tests without swarming. Fixes #1325.

Don't merged until https://github.com/numenta/nupic.regression/issues/11
is resolved.
Adding back missing data file.
Merge pull request #1327 from rhyolight/swarm-test-split

Split swarming tests out of integration tests.
Merge branch 'master' of github.com:numenta/nupic into add-back-osx
Merge pull request #1323 from rhyolight/add-back-osx

Adding back OS X to build matrix.