Fixed field.watch bug. Added more detailed documentation for it as well ...

...as documentation for the wysiwyg editor. Added readme on how to run the documentation locally.

Soo, decided to fork completely fresh, because it did seem like somehow I managed to mess up my repository.
I included #555 in here as well as a fix for #378 and I suppose that would also close #279 then.

I did test it on my project but I haven't tested out the `Function` capability and just added the documentation based on what I saw in the code.
Also checked the docs by running them locally and added that to the readme.

Tried to make sure that all is good this time ;)