Update navigation-hotekys extension
Update navigation-hotekys extension

- fix ctrl+y
- change shift/ctrl-enter behavior to just go into edit mode after
execution

benvarkey/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,jcb91/IPython-notebook-extensions,juhasch/IPython-notebook-extensions,davande/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,jcb91/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,juhasch/IPython-notebook-extensions,motleytech/IPython-notebook-extensions,jcb91/IPython-notebook-extensions,Konubinix/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,motleytech/IPython-notebook-extensions,Konubinix/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,jbn/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,motleytech/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,motleytech/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,danielballan/IPython-notebook-extensions,jbn/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,jbn/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,davande/IPython-notebook-extensions,danielballan/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,jbn/IPython-notebook-extensions,Konubinix/IPython-notebook-extensions,davande/IPython-notebook-extensions,juhasch/IPython-notebook-extensions,danielballan/IPython-notebook-extensions