Two changes:
	1) Added support for inserting separators into CyMenus
	2) Improvided font support in Tunables

Change-Id: I6120db244e2731b4d345657e9d0404f2305b3c3f
Add new methods to CyAction that are supported by AbstractCyAction
insertSeparatorBefore and insertSeparatorAfter.  Also add getProperties
to provide some future-proofing.

Change-Id: Icec121a412c4de9f7e4dafaea05e89cfae97eb95
Merge branch 'develop' of git+ssh://github.com/cytoscape/cytoscape-api into develop