Restructure fileupload as a plugin
Add callable hooks to sufiaUploader
Merge pull request #131 from projecthydra/refactor_fileupload

Refactor fileupload
This change makes it possible to have both sufia and hydra-editor installed in the same host app. (They both have view helpers named render_edit_field_partial, but they behave slightly differently.)
Merge pull request #134 from projecthydra/hydra_editor_compatibility

This change makes it possible to have both sufia and hydra-editor instal...