Ian Wienand 2b18513cad Convert element_dependencies to logging
Use standard logging module for output.  Add some basic testing of
error messages to the unit-tests.  Use the logging_config module to
setup the logging for interactive use.

Change-Id: Ia23722a7bd00aba336118edb155356a3b3ef6926
2016-06-28 16:02:45 +10:00
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2013-11-12 10:47:57 -05:00
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