ctrl-g to bring up function signature (#36)

* ctrl-g to bring up function signature

* add to readme

Author: jwkvam

.gitignore

@@ -1,3 +1,4 @@
+*.ipynb*
 tags
 tags.lock
 *.bundle.*

README.md

@@ -49,6 +49,7 @@ Shortcuts this extension introduces:
 | Ctrl-E         | Move Cell Down            |
 | Ctrl-Y         | Move Cell Up              |
 | Ctrl-O, Z, Z   | Center Cell               |
+| Ctrl-G         | Show Tooltip              |
 | Command/Ctrl-1 | Code Cell Mode            |
 | Command/Ctrl-2 | Markdown Cell Mode        |
 | Command/Ctrl-3 | Raw Cell Mode             |

package.json

@@ -1,6 +1,6 @@
 {
   "name": "jupyterlab_vim",
-  "version": "0.6.0",
+  "version": "0.6.1-dev",
   "description": "Code cell vim bindings",
   "author": "Jacques Kvam",
   "main": "lib/index.js",

src/index.ts

@@ -555,6 +555,11 @@ function activateCellVim(app: JupyterLab, tracker: INotebookTracker): Promise<vo
             keys: ['Ctrl O', 'Z', 'Z'],
             command: 'center-cell'
         });
+        commands.addKeyBinding({
+            selector: '.jp-Notebook.jp-mod-editMode .jp-InputArea-editor:not(.jp-mod-has-primary-selection)',
+            keys: ['Ctrl G'],
+            command: 'tooltip:launch-notebook'
+        });
 
         // tslint:disable:no-unused-expression
         new VimCell(app, tracker);