added inspect_as_dct to RequestDataset
fixed import error in test_ncmeta. removed ipdb in test_operations. adjusted test_projection to allow numpy returns with different spatial references.
working import of us_counties shapefile
working json output for selected ocgis shapefile geometries.
minor
added zipping utility and convenience functions for formatting a returned path and associated files.
added test for zipping utility.
added format_return to ocgis import
added docstrings
doc changes. added new page to document utility functions.
fixed bugs related inspect_as_dct
RequestDataset.inspect_as_dct attempts to put time bounds in the 'derived' key