Merge pull request #37 from chrisprom/master

Add processing prioirties enum and cleanup collections, acccessions, content JSON
Merge pull request #38 from mindking/master

DigitalFileBlob Addition
Merge pull request #39 from mindking/master

Direct Blob Extraction
normalize collection content json and add level/container indicators
Adding HTTP response codes for listed files, cleanup content, and change enums/level containers to containertypes
Content cleanup and error code addtions
Fix creator realtionship pagination and creator relationships
BBCODE Removal

Collections
Accessions
Digital Objects
Creators
Subjects