adds git commands to the summary slides

fixes #68

basics.html

@@ -667,9 +667,14 @@
           <section id="summary-1" data-markdown>
             ## you can now
 
-            - track changes in your projects
-            - browse your projects history
-            - see why a change was introduced
+            - create local repos (`init`)
+            - track changes in your projects (`stage`, `commit`)
+            - browse your projects history (`log`)
+            - rest are helpers (`status`, `diff`, `restore`)
+
+            notes:
+            - very important: `status`
+            - demo emacs git integration to show `stage -p`
           </section>
 
           <section id="summary-2" data-markdown>
@@ -993,8 +998,9 @@
           <section id="summary-3" data-markdown>
             ## you can now
 
-            - create and connect to remotes
-            - contribute to projects
+            - create and connect to remotes (`clone`, `push/pull`)
+            - contribute to projects (`switch -c`, `push -u origin`, MR/PR)
+            - hint: use `lol` alias
           </section>
 
           <section id="summary-4" data-markdown>