fix "stale pointer" bug when re-opening a subpatch on a scalar that has an event bound to it. The bug was that the scalar symbol wasn't getting unbound because scalar_vis wasn't getting called.

Get rid of some really annoying legacy Tcl commands in the core. As long as we don't have any LED indicators in the console window, show an error for audio dropouts instead. Also get rid of some debugging messages in the pddp.

revert a change to text_setto from 91cf2a84 that caused a subtle regression when a broken object gets retexted.  (It caused the object to be put at the end of the glist, which caused the consequent canvas_restoreconnections call to make a wire connection to the wrong object)

for legacy drawing commands like [filledpolygon], don't scale the stroke (this is how it worked in Pd Vanilla)

* add flag for compatibility with older OSX versions
* change library paths in script so that external dependencies are found
* build with jack support

fix #119: store canvas title for later use. This will properly display the title for a dirty canvas in the case where the Pd patch is mutated with a loadbang (and properly other cases, too)

fix a crasher with gtemplate_new dereferencing a freed pointer, and harden rule for creating a struct

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.

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)

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)

fixed up dialog, backported some code from Pd-Vanilla 0.46

Move an ifdef with a GUI-messaging side-effect out of the way of an incrementally built gui message. (And possibly a good argument for why the gui_start_vmess interface might be a bad idea...)

fix some nasty regressions with drawnumber and drawsymbol due to Ivica and I overlooking fairly obvious compiler warnings :(

fix awful regression where deleting the end of a comment, a message, or the trailing arguments of an object didn't actually change the state of the object in Pd.