Added basic code
rename to core.py
works with process_asyncs decorator except for verbose argument
minor fixes to get process_asyncs work with this
Added docstrings to methods, some changes in process_asyncs
Made items configurable
added tests
Added data for tests
added setup_package.py
minor fix in tests - now passing
fixed issue with table reading
Added docs in nist.rst
Added remote tests
handle case when no table returned and other exceptions
rebased to use async_to_sync
Minor fixes in tests
Add fix for returning payload from sync methods
Added test for payload return
Fix argument handling in irsa.Irsa.query_region

* The default spatial query type (spatial='cone') was incorrectly
  capitalized (should be spatial='Cone'), so that using the default
  always caused an empty result set.
* An 'else' clause now catches completely unrecognized spaital query
  types.
* Coordinates are now formatted in a way that is recognized by the Gator
  service.
added period at end of docstring