Update git configuration

.gitconfig

@@ -1,13 +1,22 @@
 [user]
 	name=Emmanuel Bouthenot
 	email=kolter@openics.org
-[diff]
-	color=auto
-[branch]
-	color=auto
-[pager]
-	color=true
-[status]
-	color=auto
-[log]
-	color=auto
+
+[color]
+	diff = auto
+	branch = auto
+	status = auto
+	log = auto
+	pager = true
+
+[color "diff"]
+	meta = green
+	frag = yellow
+	old = magenta
+	new = cyan
+
+[color "status"]
+	header = bold blue
+	added  = green
+	changed = bold red
+	untracked = bold yellow