Settle on final title

The system was originally FoodLoop, then LocalLoop, then the LocalLoop domain wasn't available so it shifted (in some instances) to LocalSpend. We should work out what the final name will be and ensure that that is reflected in the software, documentation and repos.

See also https://github.com/Pear-Trading/Foodloop-Server/issues/157 and https://github.com/Pear-Trading/FoodLoop-Web/issues/139