[PlatformWithOS] Ensure Digital outputs are zero at start

Signed-off-by: Christopher Hall <christopherhall.hsw@gmail.com>
[PlatformWithOS] Some example scripts (build,tmux)

The .sh file just show build/install commands

The remaining files are for setting up tmux on Debian and having it
auto-start on login and having the `Ctrl-B d` desconnect auto-logout.

Signed-off-by: Christopher Hall <christopherhall.hsw@gmail.com>
[PlatformWithOS] /etc/init.d start/stop script for demo/Clock27.py

notes:
1. copy this file to /etc/init.d/epd-clock
2. run: update-rc.d epd-clock defaults
3. create "etc/default/epd-clock" with appropriate settings
   (look inside this file for CLOCK_xxx variables)

Signed-off-by: Christopher Hall <christopherhall.hsw@gmail.com>
[PlatformWithOS] Simple barcode demo

using class/font down loaded from:

http://code.activestate.com/recipes/426069-ean-bar-code-image-generator/

Signed-off-by: Christopher Hall <christopherhall.hsw@gmail.com>