added ability for preset_hub to write/read presets or entire scenes from files. Improved documentation to reflect new additions and to improve existing.

reverted 0.43 backport as its implementation seems unstable when trying to (re)connect to jack via audio properties. Fixed a bug where closing jack while having DAC on would hang pd.

added PDL2ORK define to distinguish between pdl2ork capabilities and vanilla pd and thus make externals work with both pd vanilla and pd-l2ork

Added universal copy and paste allowing importing of patches by copying and pasting the text directly into the patch. Still need to decide whether auto-resizing of the window is also desirable (there are both pros and cons).