BUG: The mayavi.log was not logging any debug messages.  I now default the logger to logging.DEBUG however, the stream handler is set to the user specified option.  This way we always get debug logs in the mayavi.log and only get error messages reported on the console.  If the user explicitly says mayavi2 -v then the stream handler will also be set to DEBUG mode.
BUG: The mayavi.log was not logging any debug messages.  I now default
the logger to logging.DEBUG however, the stream handler is set to the
user specified option.  This way we always get debug logs in the
mayavi.log and only get error messages reported on the console.  If the
user explicitly says mayavi2 -v then the stream handler will also be set
to DEBUG mode.


alexandreleroux/mayavi,liulion/mayavi,dmsurti/mayavi,alexandreleroux/mayavi,liulion/mayavi,dmsurti/mayavi