change dashboard for demo, add milk data.
add a scope to retrieve product from indicators
Merge branch 'master' of https://github.com/ekylibre/ekylibre
add animal inventory in demo task
Merge branch 'master' of https://github.com/ekylibre/ekylibre

Conflicts:
	lib/aggeratio.rb
	lib/tasks/demo/animals.rb
	lib/tasks/demo/productions.rb