README.md: improve

README.md

@@ -1,4 +1,6 @@
-TODO: use pdfrw, pypdf2
+[![Travis Status](https://travis-ci.org/josch/plakativ.svg?branch=master)](https://travis-ci.org/josch/plakativ)
+
+[![Appveyor Status](https://ci.appveyor.com/api/projects/status/32r7s2skrgm9ubva/branch/master?svg=true)](https://ci.appveyor.com/project/josch/plakativ/branch/master)
 
 plakativ
 ========
@@ -7,9 +9,21 @@ Plakativ is German for "striking" or "eye-catching" and comes from the German
 word "Plakat" which means poster in English.
 
 This software allows one to stretch a PDF document across multiple pages that
-can then be printed on a common inkjet printer and be glued together into a
+can then be printed on a common inkjet printer, cut and glued together into a
 larger poster.
 
+Demo
+====
+
+![](demo.gif)
+
+[//]: # To make a new Video, run:
+[//]: #
+[//]: # ffmpeg -f x11grab -framerate 30 -video_size 800x600 -i :0.0+41,46 -preset ultrafast -c:v libx264 -crf 0 out.mp4
+[//]: # ffmpeg -i out.mp4 -ss 00:00:04.000 -r 2.5 plakativ%04d.png
+[//]: # convert -loop 0 plakativ*.png +map -layers Optimize plakativ.gif
+[//]: # gifsicle -b -O3 plakativ.gif
+
 Features
 ========
 
@@ -23,6 +37,22 @@ In contrast to other solutions, plakativ tries hard to find a page
 configuration that wastes as little paper as possible, offering three different
 layouter algorithms.
 
+TODO
+====
+
+While basic functionality is implemented, lots of work remains to be done:
+
+ - help button
+ - print poster borders
+ - print cutting guides
+ - changing units
+ - changing language
+ - adding advanced and complex layouters
+ - make PyMuPDF dependency optional
+ - optionally, use pdfrw and/or pypdf2 to read/write PDF
+ - improve command line interface
+ - improve module interface
+
 Comparison to PosteRazor
 ------------------------