Changes to documentation and new screenshot.

- Better README.md
- Headlines in all files
- CONTRIBUTING.md
- New screenshot

1 files changed, 2 insertions, 1 deletions

diff --git a/TODO.md b/TODO.md
index 0bf6cb1..cfca0c0 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,3 +1,4 @@
-# Todo
+Todo
+====
 
 - additional information for disk and memory (used, total, ...)