replaced the custom multi-select picklist with a jquery selectable component for ease of use
Merge branch 'master' of https://github.com/stevebuik/GraphVizForce

# By Zhiren Guan
# Via Zhiren Guan
* 'master' of https://github.com/stevebuik/GraphVizForce:
  Changed getSettings interface to provide legacy setting version compatibility
  Added ERD Settings V3 to include fields selection and group selection persistency