updating the README.. we have had DM support for a while...
updating the README.. we have had DM support for a while...

amorphid/database_cleaner,ericraio/database_cleaner,DatabaseCleaner/database_cleaner,yangc5/playlister-sinatra-v-000,eliotsykes/database_cleaner,reinaris/database_cleaner,fajrif/database_cleaner,gentoo/database_cleaner,avalonmediasystem/database_cleaner,DatabaseCleaner/database_cleaner,yangc5/playlister-sinatra-v-000,HaiTo/database_cleaner,yangc5/playlister-sinatra-v-000,yangc5/playlister-sinatra-v-000,glebtv/database_cleaner,custora/database_cleaner,claptimes5/database_cleaner,yangc5/playlister-sinatra-v-000,yangc5/playlister-sinatra-v-000,yangc5/playlister-sinatra-v-000,0xCCD/database_cleaner,simonmorley/database_cleaner,stanislaw/database_cleaner,awilkening/database_cleaner