Merge pull request #4 from mitchmac/master

Cleanup and bug fixes
Merge pull request #5 from jordandukart/master

Form validation.
Cleanup
Merge branch 'master' of https://github.com/discoverygarden/islandora_sync
Merge pull request #6 from mitchmac/master

More cleanup
Folder structure for a node's managed files. Delete files on node_delete. Cleanup.