Merge pull request #5 from numenta/readme_updates

Adds PYTHONPATH to install instructions.
Bug fix: when there's a space in the path it did not work.
Bug fix: secondary problems with spaces in directory names fixed.
Adds ordereddict and updates references to new import path.
Merge pull request #9 from numenta/ordereddict

Adds ordereddict and updates references to new import path.
Merge pull request #6 from memming/master

Bug fix: spaces in the path prevents buliding
Updates readme install instructions to include dynamic library env variable.