Patch exception due to weird timestamp entries in SQL tables

Trapped the exception and ignored the value.
Show full URI for properties that do not have prefix
Merge branch 'development' of https://github.com/InformationIntegrationGroup/Web-Karma into development
v178, fix SQL import, and property chooser in semantic types
Fix css for main page links
bug fix for the JIRA issue WK-19

https://webkarma.atlassian.net/browse/WK-19
remove some useless packages
bug fix for the JIRA issue WK-19
Fixed RDF Generation part of WK-19
v179 fix WK-17
Merge branch 'development' into logging-cleanup-modify-py

Removed some unnecessary output
Fixed the limit check on preview