Inputs for sliders, cheatsheet and parameterlists

As last pull request but now merged the changes of Nick.

Created all the parameter lists, can be found in separate html file for
you guys to copy.
Created a cheatsheet for the tags, as they can be used anywhere i made
it an persistent panel. maybe we need to revise this. Also i added
inputs and linked them to the sliders to users can enter a number and
not fiddle with the slider.

Fixed some bugs.
The only issue i have is that layer creation in the canvas is broken
now. One can not select and edit a layer anymore.