Use Flasks thread-ready cached property instead of our custom memoization func
Execute toolbar init on app init instead of before the first request
Merge pull request #9 from unaizalakain/flasks_cached_property

Use Flasks thread-ready cached property instead of our custom memoization func
Merge pull request #10 from unaizalakain/toolbar_initialization

Execute toolbar init on app init instead of before the first request