Templates, updates and dates in calendar

Templates, updates and dates in calendar

Hello,
first of all : congratulations !
You made an incredible piece of code !

1/ how can I made a template, I mean a model of application wich I can share "clean", without example data or with minimal and persistent data ?

2/ if someone copy my applications, use it and I update it, how can he take the modifications or apply them in his previous copy ?

3/ how can I choose wich date column is used in the calendar view ?

Once again : congratulations !
lipare