Remove kludge for menu popup position. As of nw.js v.0.16.1, it appears that the popup menu behaves correctly with zooming and scaling

These happen in Pd-Vanilla and Pd-l2ork, too. They happen when an iemgui is inside
a gop window and outside of the gop rectangle area-- Pd still forwards gui
messages for them.

had to revise pdlibbuilder script to get it to build on OSX. Can't really push it upstream as it's just a hack (and upstream has been aware of the problem for some time...)

handle the discrepancy between submodule name "lyonpotpourri" and libdir name "lyon" more gracefully

get rid of erroneous lyon/lyonpotpourri folder so as to start completely over with the lyonpotpourri submodule

use individual help patches for higher math objects ([cos], [sin], etc.) and cross-reference with math-help.pd

first draft of saving the preferences, including the gui preset (still won't write to file for some reason)

shorten lyonpotpourri to lyon in Makefile to match the new submodule name (which itself was changed to match Pd-l2ork)

These bugs were discovered via static code-analysis
https://scan.coverity.com/projects/pure-data-pure-data
(The CID numbers are the "Coverity IDs" used to identify the various bugs)

- Don't free binbuf within glist_readfrombinbuf (CID:74871)
- it must be deleted by the caller
- Initialize sockaddr_in (CID:74861,74862,74863,74866)
- Initialize indelay/outdelay (CID:74864,74865)
- Initialize device-arrays (CID:74853,74854,74855,74856)
- Closing unneeded sockets (CID:74827)
- Initialize sockaddr_in (CID:74860}
- Close file-descriptor if the soundfile is unparsable (CID:74822,74823)
- Close file-handle in cleanup (CID:74816)
- Call va_end() when handling variadic args (CID:74872)
- Added missing break (CID:74800)
- Prevent NULL-dereferences (CID:74792,74793)
- Size checks when copying into string buffers (CID:74844,74845,74846,74847,74849)
- Freeing no-more used storage (CID:74832)
- Fixed code block (CID:74806)
- Initialize sockaddr_in (CID:74860)
- Initialize array-values to 0 (CID:74867)
- Free allocated memory (CID:74813,74830)
- Removed allocation of unused memory
- Use pd_free() to free templates (CID:74814)
- template_free() does not free the entire structure (it misses the pd_new() part)
- initialize variable (CID:77865)
- Prevent NULL-pointer dererencing (CID:77864)
- Free heap-allocate binbuf after use (CID:74833)

we just hide the "apply" button