Deleted smaller new case icon
Merge pull request #256 from rcordovano/persistent_tags

Added persistence of tag names across cases
Updated splash and about dialogs
Merge remote-tracking branch 'upstream/master'
Made final status message more detailed
updated ingest message in wizard
updated error messages in modules. Exif uses only signatures now
Merge remote-tracking branch 'upstream/master'
Added necessary null pointer check to static initializer of Tags class
Merge branches 'master' and 'tags_fix'