Content previews
Removed lingering test file.
Merge branch 'master' into previews

* Main conflicts were change from content.name -> content.displayName
* Changed instances of createExpiringSignature to use milliseconds

Conflicts:
	node_modules/oae-content/lib/api.js
Remove *.orig file from merge
Merge pull request #2 from mrvisser/previews

Merged to master
Preview Processing PR follow up
Merge master
Fix for trace output in PDF and Office processor.
Documented prefetchCount for MQ.bind
Removed LibreOffice doc_data.txt output and added the filename to .gitignore
PR follow up:
 * Wrapped previews related data in a previews object
 * Changed queue.unbind so that the queue is no longer destroyed.
 * Cleaned up PP start procedure
 * Added the content id to the logger
 * Increased thumbnail size
 * JSDoc cleanup
By default the PP should be disabled. Also removed Mac OS X specific soffice binary.
A Mocha before callback can only take Error objects as an error parameter.
Only initializing the Office and PDF PP if the enabled flag is set to true.
Preview Processor Follow-up

 * Removing old preview files when setting new ones
 * Added Search transformer for content that signs the thumbnail
 * Renamed addPreviewItems to setPreviewItems
 * Cleaned up JSDoc
 * Removed PreviewContext.dirs object and made it a simple String
(baseDir)
 * Added tests
Add a new configuration option `globaladminonly` that, when set to `true`, only returns configured values to global administrators.
Create a tenant admin schema that has all configuration except for the `globaladminonly` elements.
Add tests to oae-config that verify the `globaladminonly` configuration option.
Removed shelljs dependency
Using correct source path in moving the thumbnail