Implement component loading asynchronously

[piraz]

We want to make sure an asynchronous code inside the component method initialize to be able to execute without errors.

Here is the component initialize method: https://github.com/candango/firenado/blob/develop/firenado/tornadoweb.py#L303-L307

The method is called in this loop:

See: https://github.com/candango/firenado/blob/develop/firenado/tornadoweb.py#L175-L199