Metadata mapping file
Discussion: https://groups.google.com/forum/#!topic/mayan-edms/zCWUA8ySjwQ%5B1-25%5D
A file containing metadata information to be applied to documents being uploaded or previously uploaded. File format: CSV or JSON. Must contain an index field which can be metadata itself or a document property like the filename. Should support single, multiple or combined index fields. Where should this code reside? Metadata app, sources, or a new app?