adding installation docs - not quite finished
I think this is sufficient to update the installation docs
Don't use numpydoc's class members feature

So many warnings.
Fix Networks docs

- Remove double documentation
- Fix some parameters docs strings

[ci skip]
Update the install docs.

Add discussion of conda vs. pip and expand how to install
Pandana with OpenMP support on Mac.
Remove install section from README.

In deference to the Sphinx documentation.

[ci skip]
Merge pull request #20 from synthicity/install-docs

Install docs