add ofxOsc ofxSnappy and ofxDepthStreamCompression dependencies

All theses dependencies are required
  ofxOsc: official OF plugin
  ofxSnappy: https://github.com/arturoc/ofxSnappy
  ofxDepthStreamCompression: https://github.com/arturoc/ofxDepthStreamCompression
Merge pull request #4 from vdonnefort/fix-dependencies

add ofxOsc ofxSnappy and ofxDepthStreamCompression dependencies