VERSION 0.98.909: REST-Api and other useful additions — JWildfireSwan Steam update #3725998

I now added a REST-Api for rendering (for later use from JWildfire) and included some other smaller improvements, like importing layers via file-dialog or the clipboard. Complete changelog: - fixed: loading of internal texture resources (presets) did not work on the exported version of the app - flame-editor: camera-section: do draw only ratio guides, but no more additional aspect guides (because the preview now always resembles the correct rendering aspect) - fixed: custom quality profiles did not show up for rendering - fixed: the was a problem in thw "ho"-variation with calculating pow() of negative arguments - added an option for the default bg transparency in the application settings (default: false) - new "bokeh"-random-flamw-generator - implemented layer (in)visibility - flame-editor: layers: functions to replace the selected layer by a loaded flame or flame form clipboard - REST-...