Updated NTA_ROOT_DIR to NTA_ROOTDIR
Merge pull request #800 from rhyolight/README-fix

Updated NTA_ROOT_DIR to NTA_ROOTDIR
Removed GPL instructions from license.
Merge pull request #802 from rhyolight/clean-license

Removed GPL instructions from license.
Add spatialImp option to multistep/hotgym experiment description file
Use cpp implementation of SP as default in hotgym example
Merge pull request #804 from chetan51/hotgym_spatialImp

Add spatialImp option to multistep/hotgym experiment description file
Merge pull request #17 from numenta/master

Rebase fork