Possible bug: wrong $verb letter case in dispatch

There can be bug when you override method by not uppercase request method name

e.g. `$_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] = 'get';` or `$_POST['_method'] = 'get';`
Merge pull request #64 from OzzyCzech/patch-1

Possible bug: wrong $verb letter case in dispatch
minor example code change
minor code reformat