Check if any controversies have been fetched
In "mine_controversy.pl", use MediaWords::CM::require_controversies_by_opt() helper similar to how it's done in "dump_controversy.pl" (in order to support multiple controversies, passing controversies by name)
Use David's mc_root_path() for determining Media Cloud root ($FindBin::Bin is unreliable because function might be run from various locations); make sure .jars really exist before running Java
Check return call of system() call before proceeding further
Ignore MediaWords::CM::Dump output files