Added citation field for WebApp
Refs #1969: Minor cosmetic improvements (Visual Style selector and Discrete Value Editor colours, VizMapper's property sheet panel width)
Added citation field for WebApp
Added citations dialog
Merge branch 'develop' of https://github.com/cytoscape/cytoscape-impl into develop
Add support for anchor type

Change-Id: I834e746bed57005724c339db88c5fb126eb320dd
Initial implementation of group annotations.

Change-Id: Id343af6a6279cb52d94ab5968df9e2d28a79468c
Refs #1251:  The confirmation dialog is now showed before the new session is read.
Rest of changes for group annotations.

Change-Id: I467c40e4db11c5a7ed6fe259a6b68df727a55b9a
Refs #1969: Usability improvements (Visual Property Sheet Item visible by default when it has a mapping; proper multiple selection on the property sheet)
Added app names with citations; added Cytoscape citation
Merge branch 'develop' into feature/json-support