Editor[-utils]: more refactoring

- remove unnecessary inc/dec in context highlighting
- move context highlighting maker to extra function
- flash-region: fuse start and end argument to make it easier to use
  with e. g. selection's output
- add some more docstrings
Api/Live: redefine buffer to make it dynamic.
Editor: change Neo-detection. Use native seesaw to determine caret-pos.
Project: update seesaw. only load required parts of incanter.
gui/editor-utils: fix neo layout detection.
UGens: add OnePole and first stab at AdCVerb.
API;editor: remove clojure.repl from api. Adapt call to doc in editor.

- clojure.repl isn't that useful in the frankentone.live namespace.
- fixes a naming conflict