fixed the bug for issue #109

It turned out that we had intentionally disabled inheriting the
properties that have owl:Thing as domain or range because of some GUI
issues in old versions (foaf:mbox has owl:Thing as range).
Merge branch 'development' of https://github.com/InformationIntegrationGroup/Web-Karma into development
remove (add) before checking if node exists in graph/tree
WK-150 @comment reject karma home did if it doesn't exist
bug fix
Merge branch 'development' of https://github.com/InformationIntegrationGroup/Web-Karma into development
Resolve the issue WK-238

With manual alignment mode, Karma only loads a list of classes and
properties.
Remove the default Thing from Steiner Tree

The tree may be disconnected if there is no path between some internal
nodes
v2.028
Merge branch 'development'