LoopAuditioneer Code

Add options to directly open previous or next file from currently selected

Make proportions even between loop and cue grid

add check to not try importing more than 16 loops

add very basic looppoint detection as suggestion when manually creating a new loop

fix some layout related issues, better default values to add a loop dialog

changed sustainsection indication on waveform, added possibility to change it on waveform if not on autodetect

updated copyright, fix crash, add sound api/device handling, add resampling if needed, updated help

Fix some spelling typos

Fix more sustainsection related bugs and format specifiers

Fix bug causing crash in autodetection of sustainsection