added "size" property to test data collection
interpolation incorrect over poles #335

Fixed row and column creation so interpolation over poles with
spherical coordinate systems now work as expected.
changed version numbers.
Merge branch 'master' into next

Conflicts:
	setup.py
	src/ocgis/__init__.py
	src/ocgis/test/test_ocgis/test_api/test_subset.py
Conflicts:
	src/ocgis/test/test_ocgis/test_api/test_subset.py