1) Changed from DISPLAY to DBUS_SESSION
# c/o
http://askubuntu.com/questions/298608/notify-send-doesnt-work-from-crontab

2) Added paths to commands

3) Simplified go_send* to single function

4) Add icons to remove gnome dependency:  they are a standalone
derivative work of ktimer.png (Stefan Schimanski <schimmi@kde.org> is
original author) which is GPL
http://www.kde.org/applications/utilities/ktimer/