- fixed a lot of bugs in the csg core
 * fixed issues with simplified api, now correctly accepting the second "parent" parameter
 * added tests for the simplified api
 * fixed issues with converting mixed 3d /2d hierarchies to 3d
 * updated the fromCompactBinary (web workers) to work correctly with both 2d and 3d geometry

- added preliminary version of parameters "global to project"
 * residing in the preprocessor it looks for a "params" object defining how the configurable parameters should be displayed
(for now still retaining the openjscad syntax, if not the actual code behind it)
 * parsed params get added to "project.meta.params"
 * modified the compiler preprocessor and processor to allow for feeding back these params
 * no UI for this (yet)
modified the resizing method for the 3d view so the width/height ratio is set correctly
- just some experiments for regexps, parsing etc