updated NuPIC installation readme
updated readme w/ info for contributors
Merge pull request #1582 from BoltzmannBrain/new_readme

updated NuPIC installation readme
fixed variable name in spatial_pooler.py comments
Merge pull request #1603 from BoltzmannBrain/sp_typo

spatial_pooler.py comments typo
Updates nupic.core to 64f7abb2903120a253d634d8d15dcbca4ca8dca7.
Merge pull request #1607 from numenta-ci/core-update-sha

Updates nupic.core to latest built SHA.
Updates nupic.core to f0ca0ddd37abc65221d4f5ef24a416fc29fc1bb4.
Moved some linux-only logic from travis config to script.
Refactor bindings
Fixed confusing and erroneous comments
Merge branch 'master' of github.com:numenta/nupic into fix-bad-comment
Merge pull request #1608 from numenta-ci/core-update-sha

Updates nupic.core to latest built SHA.
Merge pull request #1610 from DavidRagazzi/refactor_bindings

Bindings refactored
Update classifier error message.
Replace $NUPIC to ${TRAVIS_BUILD_DIR}
Merge pull request #1611 from rhyolight/fix-bad-comment

Fixed confusing and erroneous comments
Removing compilier aliases
Merge pull request #1614 from DavidRagazzi/nupic_var_replacement

Replace $NUPIC to ${TRAVIS_BUILD_DIR}
Merge pull request #1612 from scottpurdy/cla-classifier-fix-error

Update classifier error message.