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
Fixed test failures.

Fixed SPRegion so it internally creates default constructor parameters based on old FDCRSpatial implementation. This is needed for backward compatibility.

CLARegion still uses old spatial pooler. This region is not compatible with the new spatial poolers and really is not being used in the OPF or anywhere meaningful. We should get rid of it.

Updated hotgym and expGenerator description files to use parameter names from the new spatial pooler.

Some old description files in opf/experiments that being used only in tests now explicitly use the old spatial pooler.
Merge branch 'master' of github.com:numenta/nupic into spatialImp_switch_default