Cleanup Entities

Original "entities.mtz" replicated all default Maltego and Casefile
entities.  This had the effect of overwriting the user's default Maltego
(and possibly Casefile) entities when Canari was run.  Not a bad thing
if they don't differ, but should they be updated before Malformity was
updated it could cause issues.  Also remove all unused entities from
both "entities.mtz" and "entities.py."  Also removed a "canari.conf"
that seemed to be mistakenly placed in the "etc" directory.  This file
is handled by canari automatically and should not be placed by each
canari package.

Ryan