allow callables to be registered as repository classes
allow callables to be registered as repository classes

Intendit/bolt,joshuan/bolt,electrolinux/bolt,GawainLynch/bolt,electrolinux/bolt,HonzaMikula/masivnipostele,HonzaMikula/masivnipostele,lenvanessen/bolt,joshuan/bolt,Raistlfiren/bolt,Intendit/bolt,lenvanessen/bolt,romulo1984/bolt,HonzaMikula/masivnipostele,romulo1984/bolt,Raistlfiren/bolt,electrolinux/bolt,Intendit/bolt,cdowdy/bolt,bolt/bolt,GawainLynch/bolt,cdowdy/bolt,GawainLynch/bolt,rarila/bolt,Intendit/bolt,lenvanessen/bolt,rarila/bolt,cdowdy/bolt,bolt/bolt,HonzaMikula/masivnipostele,lenvanessen/bolt,GawainLynch/bolt,Raistlfiren/bolt,joshuan/bolt,electrolinux/bolt,rarila/bolt,cdowdy/bolt,rarila/bolt,joshuan/bolt,nikgo/bolt,romulo1984/bolt,Raistlfiren/bolt,romulo1984/bolt,nikgo/bolt,nikgo/bolt,nikgo/bolt,bolt/bolt,bolt/bolt