Juggling Lab Files

(desktop) Added a Library tab providing access to an included set of pattern files. (desktop) Added CLI option tolayout, to export pattern layout data in JSON format. Fixed internal errors dragging ladder diagram events in high-bps patterns (203). Fixed internal errors caused by permutation element out of range (201). Fixed bug in siteswap parser where an invalid pattern could be parsed as valid, if it had a valid prefix. Example: (6,4x)(4x,0)(4x,0)(2,4x))(2x,4)*. Parsing now must match the entire input. Clamped value of border to prevent viewport from inverting, and removed border from Animation Preferences UI (still allowed as a manual setting). Removed occasional spurious events at bottom of ladder diagram (duplicates of events at t = 0). Fixed implementation of negated character classes (regex) in siteswap generator include/exclude feature. Improved error messages in many areas. (web) Added scroll bar to "Open Pattern List" screen when running on a non-touch device. (desktop, macOS) Fixed handling of maximized windows on macOS. Made multiplex patterns look better in ladder diagram. (desktop) Wrap long lines in pattern list windows. (desktop) Changed background of saved animated GIFs to pure white. (web) Made the space bar toggle animation pause, in the web app. Removed height, width, and fps from Animation Preferences. A new dialog queries these values when saving an animated GIF, or these settings can be included in the -prefs switch when saving GIFs from the command line.