removed "misc" folder from default project initiation
changed some project related label names
added dialog for file exists conflict
cleared up context menus
added user accounts to link with workspace settings

- projects are expanded when added oder on application start
added restriction to "new project" dialog

-prevent the user from creating more than one project with the same name or path
Merge branch 'freeplane_master' into workspace_1.0
some changes

-cleared up context menu
-corrected settings paths
-add warnings to the "new project" dialog
removed "references" folder

-only add the reference node to the workspace
caught reference node dblclick action
-expand docear library node by default
small bugfixes for expanded node handling
Merge branch 'freeplane_master' into workspace_1.0
use settings home to store user settings

and some minor changes
removed file filter for repository folder