Nupic

* Raise explicit exception if user passes non-str path
* SP: simplify local inhibition
* SP: adapt tests, sort winning columns output
* SP: simplify active columns assignment
* SP: simplify global inhibition
* file Rename as hello_tm.py and modifications in comments

* Added src/nupic/frameworks/opf/common_models/cluster_params.py and supporting files from numenta-apps htmengine. A separate numenta-apps PR will remove this code from htmengine.
* fixes 2592
* fix for 2265
* fix for bug 2265
* Fixup Dockerfile to install nupic.bindings, and other cleanup
* Adding C++ compiler requirement to README.
* Fix for test failure
* Fixed stream definition reference error.
* Reduce default reestimation period.
* Remove greedy reestimation of distribution
* Pointing README to proper bindings version.
* Continuing work on 0.3.4.dev0.
* removing a test that depends on nupic.vision
* PCA_Node test: some fixes, WIP
* formatting
* test for PCANode region
* remove Pillow from requirements.txt as it was used for vision only
* fix merge mistake in csv file
* move test from PCANode to nupic.vision unittest

* Include additional file types in MANIFEST.in, consistent with setup.py
* Pattern and Sequence machines using nupic::Random
* Wrap sparse matrix implementations with cortical column-centric semantics as a way to abstract away the underlying implementation
* Re-enable testHotgymRegression

* Update to nupic.bindings version with fix for platform differences
* Rename nupic directory to src/nupic
* Updated S3 URL to nupic.bindings for Linux install
* Fix paths for data files in an integration test
* Fix issue with storing temporary file in wrong location in integration test

* Specify nupic.bindings version to match commit sha (0.2).
* Use logging.debug for emitting the message about not being able to import matplotlib; we log it at debug level to avoid polluting the logs of apps and services that don't care about plotting.
* Add Dockerfile ready to perform swarming.
* Removes PCANode
* Updated Linux binary install instructions.

* Updated comment about greedy stats refresh when likelihood > 0.99