Fix git-uncomitted.

Now it will list modified and staged files, modified and unstaged files
and entirely new files not yet staged (that aren't in the ignore list).

Documents/bin/git-uncommitted

@@ -2,6 +2,6 @@
 set -eu
 
 {
-    git diff --name-only
+    git ls-files --modified --others --exclude-standard
     git diff --name-only --cached
 } | sort -u