Add current/ to links on Downloads page.

Resolves #531
Updating qTip and using Viewpot plugin.  Resolves #361
Adding Query to error output for database statement.
Patching ParserController and State-sample to handle structure metadata without stomping on it.
Fix inaccurate comment
Patching Structure class to show children that don't have laws when INCLUDES_REPEALED == TRUE.  Resolves #537
Merge remote-tracking branch 'upstream/master'