Merge branch 'master' of https://github.com/lucaswerkmeister/JFractalizer
ClassChooserDialog: ESC now cancels

Additionally, there is a Cancel button that does the same thing.
Improved keyboard usability of CIF fractal dialogs

The Edit Boundaries dialog and the Additional Parameters dialog can now be
OK'ed or Canceled by pressing ENTER or ESC. Also, the tabbing order is
more consistent.