Optimized getting column types and names

Instead of trying to load the entire table to get the column metadata
of the result set, use jdbc to query for the column metadata directly.

removed some unnecessary imports.
show all KarmaError messages on the screen instead of just the first one
Merge branch 'development' of https://github.com/InformationIntegrationGroup/Web-Karma into development
Fix generation of URIs for typed literals, remove warning, v186
Merge branch 'development'