Update VE core submodule to master (f1fd9a8)

New changes:
eaa4528 Queue up annotation changes to make operations safer
09fc01f [BREAKING CHANGE] Remove span-wrapping of images
b59f85f Followup b141a7d2: make inspectors not close immediately in IE
1088cac Define kbd font-family explicity in case environment overrides
137add3 Fix embeddable desktop context popups
a2f0f80 Rename getRelativeOffset to getBoundingRect and use in getSelectionRect
fc09114 Fallback to node position when getting selection rectangle
1506099 Change comment to meta in whitespace test case to actually test whitespace handling
7dc4854 Remove global overlay classes when destroying MobileSurface
6e6b08a Update OOjs UI to v0.1.0-pre (d6008381aa)
e0a8089 Destroy WindowManagers in Context and Surface destructors
8c71904 Never embed the context when an inspector is present
163bd50 [BREAKING CHANGE] Rename 'image' to 'inlineImage'
5dd8bad Make focusables behave correctly when $element != $focusable
ba6fba7 Basic block image (figure/figcaption) support

Update changes:
* ImageNode was renamed to InlineImageNode in VE core
* BlockImageNode and BlockImageCaptionNode were added in VE core
* ve.ce.ImageNode.css was removed in VE core

Change-Id: Ide31b47448a4b4d6388f84a7a6ee9d471c1331f6