Merge pull request #54 from tclose/master

Fixed and streamlined Mac Neuronvisio installation
Updated the CHANGES with the latest info.
Corrected some bad characters in our ModelDb.xml.
Better user message if we can't load a model automatically.

A new Dialog is provided to explain to the user why we can't open the model.
The log info has been trimmed and it's not more terse.

Fix #56
Using platform specific command to open the folder.

Fix #56 for real.
Using absolute path for the filename to avoid misplaced probl.
Updated the Changes with latest Issues closed
Improved the documentation about how we load the models from ModelDB.
Inserted a full stop in the docs.
Improved the note if not mosinit.hoc is available.
Using pip to install dependencies, so we can install mayavi from github.
Updated version for Release.
Merge branch 'master' of git://github.com/mattions/neuronvisio

Conflicts:
	neuronvisio/modeldb/ModelDB.py