Ledshimdemo

Corrected the duration effects are shown plus plenty of refactoring and tweaks.

Add a 9th effect 4
Allow the list of effects to use to be customised 5
Automation and testing for release management 9

Plus lots of other tweaks and changes.

Changes for the following:
Review issues with dependencies when installing on Raspbian. 11
Tests not working when run from command line. 12