Adds new files supporting the refactored nosetests framework.
Adds time axis to 'time' parameter.
Continues migration from test_coverage_basics.
Continues migration from test_coverage_basics.

Replaces uppercase parameter names to lowercase in tests.
Comments out migrated tests in test_coverage_basics.
Removes working directory if exists.
Completes migration from test_coverage_basics.py

test_slice_and_dice omitted from tests due to suspected duplication with test_get_by_slice.
Adds get_props decorator function

Adds get_props() decorator function and TESTING_PROPERTIES class dictionary to enable subclasses to provide properties on a class-wide and test-by-test basis.  This allows the tests defined in CoverageIntTestBase to remain generic and flexible.
Adds tests and minor cleanup.

Adds test for checking the list_parameters() function.
Refactors assertions using SimplexCoverage to AbstractCoverage.
Adds override for empty coverage test.

Added override for test_get_by_slice.
Adds coverage for _axis_arg_to_params.
Moves CRS tests to coverage_test_base.py
Adds ViewCoverage tests.
Deletes unused class.

Class migrated to coverage_test_base.
Adds test_crs_values.

Migrates standalone CRS test functions to new class.
Migrates standalone parameter tests.

Moves standalone parameter tests to test_parameter_values.py so they do not run more than once.
Updates function names and usage.

Renames functions to be in-line with test performed.
Removes usage of num_timesteps and OMIT_TEST_NO_DATA to test for an empty coverage.
Switches tests to appropriate class.
Adds @skip decorator and refresh test.

The @skip decorator was added to tests where the test is not applicable.
Adds test for refreshing coverage.
Merge pull request #61 from oceanzus/refactor_cm_tests

Refactors CoverageModel Tests