Add 'id' member to the geojson point features
Switch to Google style docstrings

Napoleon is the Sphinx extension used to parse the docstrings.
Fix GeoJSON output test

Added the expected "id" values to "tests/sample-archmap.geojson"
Fix a comment typo in 'archmap.py'
Fix badges in 'README.rst'
Use 'napoleon' from 'sphinxcontrib'

For use with Sphinx under v1.3
Use Python 3.4 intersphinx mapping
Use 'open' instead of 'file' for argument types
Merge pull request #12 from maelstrom59/napoleon

Use Napoleon to parse 'Google style' docstrings
Remove support for geojson.io

There isn't much need for this anymore. The idea origianlly was to
use geojson.io to generate different output formats - issue #6, this
is now all done in archmap.py though.

It seems like a lot of extra baggage to keep around for cutting out
just 2 small steps:
* Opening up http://geojson.io/
* Clicking `Open` and importing the GeoJSON
Fix license badge capitalisation
Remove `github3.py` from `requirements.txt`

In e36d618e376e904ff492d6aeb4ba6fe92ea91e6a support for geojson.io was
removed, `github3.py` was only needed for that so it's no longer needed.