Nuke 11 support

v1.8

Update changelog for release

v1.7

• ToolSets/Delete submenu is excluded from tabtabtab.
  Github issue #6
• Document that Ctrl+Tab opens the original tab menu
• Fixed bug which caused the node list to stop updating
  Github issue #10
• Fixed bug where "last used node" might have matched a different
  node (contrived example: the restored Blur [Filter] search text
  might have matched the more highly weighted Blur2 [Filter])

v1.6

• Code to add to menu.py more robust, so tabtabtab errors will
  never prevent Nuke from starting
• Search string starting with space will disable the non-consecutive
  searching, so [tab][space]scen will create a Scene instead of
  a highly weight ScanlineRender
• Exposes menu items in nuke.menu("Nuke") along with the nodes.
  Meaning items in the "File" menu etc are exposed, for example
  [tab]exit will be the same as "File > Exit"

v1.5

• Fixes crash-on-exit for Nuke 6.3v8 (as Nuke bug #23576 is closed)
• Window now closes properly

v1.4

• Blocks Nuke UI when active. This greatly improves usability when
  the weights are slow to load (e.g in heavy Nuke script, or slow
  home-dir access), as it prevents key-presses intended for
  tabtabtab from being handled by Nuke (possibly creating
  new/modifying nodes etc)
• Up/down arrow keys cycle correctly
• Indicator blocks now actually indicate node weights, instead of
  always being green. The blocks are also now narrower, which looks
  nicer
• Prevent vertical scrollbar (reduced number of shown items to 15)
• Node weights are loaded on every invokation, preventing
  overwriting of values with multiple Nuke instances

v1.3

• Created node remains selected between tab's, meaning "tabtab"
  creates the previously node
• Clicking a node in the list creates it
• Window doesn't go offscreen if cursor is near edge

v1.2

• Window appears under cursor

v1.1

• Node weights are saved

v1.0

• Basically working