Shows cmake version.

Fixes #899
Download, build, and install python, setuptools, pip, and nupic python
dependencies from scratch in order to build nupic following recent changes to
Travis-CI
Merge pull request #906 from oxtopus/901-travis-cmake-errors

Update NuPIC Travis-CI config
Merge branch 'master' of github.com:numenta/nupic into cmake-version

Conflicts:
	.travis.yml
Updated comment
Merge pull request #900 from rhyolight/cmake-version

Shows cmake version.
Default directories structure (python standard)
$NTA replaced by $NUPIC
Setup.py, Travis, CMake and Readme updated
Fixed nupic.rootDir
Replaced 'examples' to 'share' when appropriate
Replaced relative to absolute path in experiments