Fixture for simple geometry WKTs and basic Python test structure

[bekozi]

• Pull WKT from Wikipedia: https://en.wikipedia.org/wiki/Well-known_text.
• Create basic directory structure for reference implementation using Python as an example.

[bekozi]

Done.

• Added basic test fixture in "data" folder.
• Moved use cases to "data" folder following from #2.
• Added Travis CI testing.
• Added "src" folder to hold reference implementation in various languages.
• Added basic test infrastructure for Python.

[dblodgett-usgs]

I started something in R... I pushed it to a branch on my personal fork... https://github.com/dblodgett-usgs/netCDF-CF-simple-geometry/blob/R_example/use_cases/huc12_eta/write_data.R

I'll work on that when I get some time and PR it here when it's ready.

[bekozi]

Cool. The structure I put together should accommodate multiple languages. We should try and work off the same test fixture for the simple geometries at least: https://github.com/bekozi/netCDF-CF-simple-geometry/blob/master/data/fixture_wkt.json.

Everything is modifiable and open for discussion at this point!

[dblodgett-usgs]

👍 I'll switch my stuff over to more basic data. The data that @twhiteaker and I put up can get run as further examples.