reusing the same staticAppConfig for the request instead of for the mojit

Hi,

would that something mojito team might consider? it could live behind a staticAppConfig and be disable by default. When dealing with expressive amount of config and tens of mojits this change can save more than 10% on performance.

The change intends to use a copy of staticAppConfig per request instead of per mojit dispatch. Tests with our application looked OK.

Please comment.