modified coverage handler to use different types
added tests to to test pydap handler
change str to basestring to handle unicode
added test for list and added exception to handle non supported types
added changes for erddap sequences
added support for erddap
removed pretty print because of bug with it
monkey patched pydap version for erddap sequence support
added skip tests for cei because Coverage instances can not instantiated on
hosts that do not share datasets via NFS
fixed registration test because of handler changes
skipping test because Host requires file-system access to coverage
files, CEI mode does not support.
fixed bug forgot to add imports
fix for boolean type
Merge pull request #540 from mbarry02/cov_handler

Cov handler