Added memory storage & memory data store
Merge branch 'develop' into memory-store-storage
Merge branch 'develop' into memory-store-storage
Added 'id' key when saving to memory data store
Changed data store schema
Merge branch 'develop' into memory-store-storage
Merge branch 'develop' into memory-store-storage
Merge branch 'develop' into memory-store-storage
implemented getPhotoResource() and getPhotoUrl() for Memory storage
Fix: UrlSource writing response headers to file causing invalid image
Renamed 'example' folder to 'samples'
Deleted standalone folder
Merge branch 'develop' into memory-store-storage

Conflicts:
	samples/collection-push.php
	samples/files/defaults/not_found.png
	samples/manipulations.php
	samples/setup.php
	samples/upload-photo.php
	samples/url-upload.php
Added memory sample