Installation and GridApp Tutorial

[jsimkins2]

• Created installation tutorial what details setting up the gridTools environment with the new pip install setup.py method
• Created detailed visual tutorial with explanations for using the interactive gridTools application

[jr3cermak]

Add to ~/src/gridtools/.gitignore:

# Ignore MacOSX items
.DS_Store

For installation instructions (3.1?), python setup.py install is not a recommended practice anymore. Encourage: python -m php install .

I have spent several hours trying to get both patterns to work equally and it is impossible.

setup.py wants git repo references in one pattern pip wants git repo references in a different pattern

So, we should support the pip way of things. I have seen few comments indicating the state of the python packaging is not in a real good state at the moment.