replaced connectable signals with multicast connections
use -autoconnect with -replayLazily
remove RACCancelableSignal forward declaration
added names for -replay and -replayLazily
Merge remote-tracking branch 'origin/master' into multicast
weakify/strongify
use an init instead of a class method
consistent naming
doc updates
more tests
synchronize for a little less time
note that the method is thread-safe
Merge pull request #235 from github/multicast

Replace connectable signals with multicast connections