Updated uses of new encryption artifact.
Updated name of encrption artifact.
Extracted thumbnail generation to a utility class.
Add thumbnails for content and blackboard artifact tags for the html report.
Merge branch 'develop' of https://github.com/sleuthkit/autopsy into encryption

Conflicts:
	Core/src/org/sleuthkit/autopsy/report/ReportGenerator.java
Updated attributes associated with encryption artifact.
Link to content in HTML reports for blackboard artifact tags that refer to image files.
Removed duplicated logic in exif parser.
Removed deprecated comment.
Updated logic in default action for data result nodes.

Conflicts:

	Core/src/org/sleuthkit/autopsy/directorytree/DataResultFilterNode.java
Merge pull request #401 from jawallace/minor_cleanup_tasks

Minor cleanup tasks
Don't refresh tree for general info artifacts.
Don't refresh directory tree when a module data event is called for the general info artifact.
Merge pull request #402 from jawallace/gen_info_shouldnt_refresh_tree

don't refresh directory tree when a module data event fires for the general info artifact.
Merge pull request #398 from jawallace/thumbnail_reporting

Thumbnail reporting
moved jpeg header check method to public image utils class.
Merge pull request #405 from jawallace/merge_fix

moved jpeg header check method to public image utils class.
catch calls to complete() and return to old approach of calling init() on each module
Merge branch 'develop' of github.com:sleuthkit/autopsy into develop
Merge pull request #399 from jawallace/encryption

Encryption