message: updated for OSX builders
  Updated build tutorial for OSX contributors  (missing dependencies) .
diff: @@ -16,7 +16,7 @@ Then install [Homebrew](https://brew.sh).
  Dependencies
  ----------------------
  - brew install automake berkeley-db4 libtool boost --c++11 miniupnpc openssl pkg-config protobuf qt libevent
  + brew install automake berkeley-db4 libtool boost --c++11 miniupnpc openssl pkg-config protobuf qt libevent libsodium
  If you want to build the disk image with `make deploy` (.dmg / optional), you need RSVG
  