copy files from karma-lmodel-layout
updates from Chen - version15
v1
comment view model using straight lines
v2 - rem draw table, add event listener basic
add event
add class and property dropdowns
handle edge specialization
adjust layout height
add linkType to class of link to style links
add option to switch between force and the original wide layout
Initial karma on storm implementation
Refactoring RDFMapper
Add reducer to storm topology
WK-336 @comment constant nodes behave as object properties if URI and data properties if not.
Remove _id and _type and collapse objects to just uri if all we have is type
Fix for concise json
Issues on Undo/Redo commands
Another fix to avoid losing nested objects
WK-342 @comment Make SetMetaPropertyCommand backward compatible