Merge branch 'improve-slides' of https://github.com/iglpdc/git-novice …

…into iglpdc-improve-slides

motivation.md

@@ -3,15 +3,28 @@ layout: slides
 title: Version Control with Git
 subtitle: Motivation
 ---
-## Why Use Version Control?
+
+## Why Version Control?
 
 Let some software handle the versions of your project let you focus on your
-project.
+project
+
+## Version Control Features
+
+- history of all changes: what, when, and by whom was changed
+- revert to any previous version
+- collaborate in the same files without fearing conflicts
+
+## Two main concepts
+
+- *commit*: a recorded set of changes in your project's file
+- *repository*: the history of all your project's commits
 
-## Why Git?
+## Why Git & Github?
 
-Because many people are using GitHub to collaborating.
+- no need for a server: easy to set up
+- GitHub's strong community: easy to ask for help
 
 ## Next Steps
 
-[Here we go!](01-basics.html)
+[Let's start our lesson](index.html)