Merge pull request #14 from AltitudeHK/singlePhoto

Bug fix for requestHandler.js and server.js - can now access hard coded single photo
Merge pull request #15 from AltitudeHK/singlePhoto

Fix __directory in requestHandler.js
Merge pull request #16 from AltitudeHK/singlePhoto

Update photo service with upload, retrieveOnePhoto, retrieveAllPhotos functions
Add month and year services