updated jQuery
Added possibility to upload raw JSON (front-end -- back-end JSON)
Added remove confirmation dialog
minor frontend changes
UI for removing diagrams from database
frontend cleanup
reworked upload screen
joined load graph and start visualization steps on uploadFiles page. Removed saving uploaded file to file system.
dropped some unused functionality, merged DefaultPage with UploadFiles servlet
rebranding
moved frontend code to directories following Maven convention, dropped libraries that are managed by Maven