What is a recommended way to do development on the paperUI?

I would like to contribute to the paperUI development, however, struggling but how to get started.
Making a change and running it in he eclipse does not seem to be possible.

Hence the question:

  • How to run the code changes made to paperUI (without rebuilding full distro)
  • is there an alternative recommended editor?
  • Are additional tools needed

The Paper UI is at ESH, so you should ask such questions there. There have been long discussions already and you best ask the web guys there what they suggest to do it best.