fixes gh-18   scad_render_to_file() now can be called from the terminal
Add license information to the README
Merge pull request #19 from hroncok/patch-1

Add license information to the README
Added License link to TOC
Merge branch 'develop'
Fix issues with install_data missing from the sdist package.

Added a tox.ini to allow tox to run tests in virtualenv

Add .gitignore to ignore the .tox directory created by tox and the .idea directory created by pycharm.
Expand test cases to output a diff on assertEqual failing instead of the strings which are hard to understand.
Add missing png requirement
Fix tests to not fail if run from the parent directory

Add missing PyPNG dependency
Start adding sphinx documentation
Merge pull request #22 from dwighthubbard/master

Ridiculously delayed pull merge.  Various packaging changes and bug fixes for dwighthubbard's
Merge branch 'master' into develop

* master:
  Start adding sphinx documentation
  Fix tests to not fail if run from the parent directory
  Add missing png requirement
  Expand test cases to output a diff on assertEqual failing instead of the strings which are hard to understand.
  Fix issues with install_data missing from the sdist package.
  Added License link to TOC
  Add license information to the README
  fixes gh-18   scad_render_to_file() now can be called from the terminal
All tests now pass in Python 2.7.5 and Python 3.4.1 (if a Python 3-compatible Pyeuclid is installed.)
Changed README.md to reflect that SolidPython can be installed using pip.