added dev to version strings
updated download link.
Changed the version test to not use named attributes.  Added the failed
version number to the error string.
working tile example with simple test.
before fixing test failure related to missing indices
before fixing test failure related to missing indices
Merge branch 'timcera-master' into dev
working tiling/chunking with tests
added slice arguments to definition.py
slices passed to ocgoperations
ocgis/test/test_operations.py:Test.test_as_url failing
remove _in_url=False from SliceRow
before modify nc converter to have method returning empty open dataset object
before fixing index error related to schema building
working chunking example test.
before changing test files to comply with new TestBase framework.
tests now use a common superclass TestBase and have access to the test_data attribute which holds path information for test datasets.
all tests except test_env now inherit from TestBase.
changed url and license in setup.py
modified arguments making them sub-commands. added package sub-command to compress test nc files and shapefile datasets.