Doc enhancement: readthedocs examples broken

[jjennings955]

The examples at https://idom.readthedocs.io/en/latest/examples.html seem to be based on an older version of code and there are some API changes that break many (maybe all?) of them.

For example in the To Do List example creates callbacks for events like this:

task_input = idom.html.input(onKeyDown=add_new_task)

... ...

delete_button = idom.html.td(idom.html.button("x"), onClick=remove)

but the current API has you pass the callbacks as a dictionary

Something like:

task_input = idom.html.input({'onKeyDown':add_new_task})

[rmorshea]

Thanks @jjennings955 I'd completely forgotten about that.