Fixed errors in oec_query.py, created unit tests for module using remote
methods
Added oec2py module. Created local and remote unit tests. Added methods
to oec_query using oec2py classes.
Deleted test_open_exoplanet_catalogue.py in favour of local and remote
testing using unit tests.
Added and fixed doc strings in oec_query.py
Fixed doc string
Merge branch 'open_exoplanet_catalogue' of https://github.com/CadenArmstrong/astroquery into open_exoplanet_catalogue

Conflicts:
	astroquery/open_exoplanet_catalogue/oec_query.py