Added placeholder validation methods
Flushed out methods for validating keyword args.
Added validation for required request parameters.
Added more tests and refactored to UnitTest set up.
Bug fix in DataRequest class; more tests.
Trimmed excessive documentation.
Added more tests: test_api.py has 99% coverage.
Fixed typo in pybea.py.
Fixed some typos in test_api.py docstring.
Started test suite for pybea.
Added some tests for pybea.py
First pass at writing some tests. Overall coverage is at 92%.