Updated hash database code and its clients to use new comment feature of API
Removed default case name comment when adding to a hash db
Merge branch 'develop' into hashdb_comments
Updated the labels in KnownStatusSearchPanel fro multiple known databases
Updated HashDb for chnage in hash datbases API (accepting nulls in place of empty strings)
Merge pull request #345 from rcordovano/hashdb_comments

Added ability to comment hashes stored in hash databases