CSV Importer

[ghost]

First pass at a CSV Importer, currently:

• supports metadata
• supports multiple file upload from a local folder, depends on a 'file' column in the csv with multiple values separated with | or ; (also small refactoring of the object factory to support multiple files)
• csv file must exist on server already; files must be in a folder called files within the same dir as the csv (working on principle we'll have an import path, eg. tmp/imports/import_no/
• supports rights statement override
• sets visibility to open (unless it's already set in a column called visibility)
• requires a column called 'identifier' in the CSV
• skips lines without an identifier
• validates required fields (static list at present)

@todo

• some conflict with JS to sort out (buttons for OAI showing up in certain cases) - Conflict with JS #16
• collection creation - waiting on Refactor Collection Creation #9
• file upload Add file upload for CSV Importer #17
• field mappings (to de-couple from local metadata schema) - Bulkrax Importer/Exporter/Entry Interface #10

[orangewolf]

This is looking really solid. One performance related question, but all the rest are pretty niggly things =-D

[orangewolf]

Feel free to merge when ready