Fetch cancellation (#2)

Update useFetch.js

Create useData.js

Create useForm.js

Merge pull request #1 from shff/add-license-1

Create LICENSE

Minor refactorings

Add exports and add useRouter

Create useStateListener.js

Create useStuck.js

Create useGeolocation.js

Create useDOMState.js

Create useScrollDetection.js

Create useFormInput.js

Create useBroadcast.js