Updates to ajax and new documentation

ajax(...) function no longer relies on the fetch api, and instead uses the native XHR request and is cancellable.

Also added new documentation @ https://servable.netlify.com

0.3.3

v0.3.3

0.3.1

v0.3.1

0.2.0

v0.2.0

0.1.5

v0.1.5