added pyugrid iris test
added method to load a UGrid from an open netCDF.Dataset
Merge branch 'master' of https://github.com/pyugrid/pyugrid
Add matplotlib to .travis.yml

Enables notebook_examples tests.
added one more test file
added some features to the wxPython grid viewer.
fixed bug in build_face_face_conectivity -- index error!

also re-arranged 21 triangle sameple data set to be all CCW.
added test to read back in the file after saving to make sure it loads.

more tests might be good, but it's a start.
fixed bug in find_data_sets -- it was crashing if a DataSet did not have a standard_name attribute.
Switch to conda based test environment.
Correction to typo
Merge pull request #45 from bjlittle/requirements-typo

Correction to typo

thanks!
Merge pull request #44 from rhattersley/conda

Switch to conda based test environment.
Update README.md

Added period to trigger Travis to check out the new YAML for a conda test build.
Merge pull request #2 from pyugrid/master

Update fork.