simplify graph defs js files, make work out of the box

* split up into a file per graph
* use the same targets everywhere,
  3 random walks so that it works with graphite out of the box
* set simpler, generic titles
* use single quotes where applicable
* optimize for diff-ability
* make sure drawNullAsZero is always a boolean, not a string
* remove anthracite/ES urls. they are documented anyway
* make all simple graphs no line/stack toggle, legend reorder, but
  but external legend