lov integration for properties and classes

Integration of Linked Open Vocabularies (LOV - http://lov.okfn.org/dataset/lov/apidoc/) for suggesting properties and classes
Merge branch 'lov-suggest' of https://github.com/LinDA-tools/r2r-designer into lov-integration
wip: cleaned up rdf view
wip
wip
merge master
wip
integrates lov suggestions and pre-computed property suggestions based on column names
Merge branch 'master' into lov-integration