Assume main, rather than current, queue for callbacks
Added ObjC-interface
Cleanup and documentation
use the correct key name when reading the Address displayName from a HashMap
Merge pull request #431 from CodaFi/assume-main-thread

- Assume main thread.
- Added Obj-C accessors for callbackDispatchQueue.
Merge pull request #432 from NemoPrivacy/master

MCAddress.cc: use the correct key name when reading the Address displayName from a HashMap
Merge remote-tracking branch 'upstream/master'