osx: I've finally found how to set up actions that happen as soon as text field content changes.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2443 86ba831e-150c-0410-ab35-e06eaae15ed9
* Ability to visualize dynaseg fragments on the automap when am_drawnodelines is active
* Incremental refinement to dynaseg centerpoint calculation (still doesn't "fix" the issue, which is inherent in the approach being taken, but does remove some incorrect bias).
* There is no need to try to walk down the zone tag chain for PU_FREE when doing a heap check - it's always empty.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2444 86ba831e-150c-0410-ab35-e06eaae15ed9
Fixed initialization of zeroarray.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2445 86ba831e-150c-0410-ab35-e06eaae15ed9
Skeletal progress toward dynaseg BSP builder

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2446 86ba831e-150c-0410-ab35-e06eaae15ed9
osx: now the Xcode project of EternityEngine has a shell script that packs the executable (if UPX is installed, by default via MacPorts) and deletes all *.h files from inside the app folder.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2447 86ba831e-150c-0410-ab35-e06eaae15ed9
Added a (I think terse) README.txt file as a start to explain how to build on Mac.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2448 86ba831e-150c-0410-ab35-e06eaae15ed9
osx: Deleted obsolete files

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2449 86ba831e-150c-0410-ab35-e06eaae15ed9
osx: now just use ETERNITYUSER and ETERNITYBASE environment variables, instead of sending -base and -user parameters

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2450 86ba831e-150c-0410-ab35-e06eaae15ed9
Finished(?) dynaseg node builder.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2451 86ba831e-150c-0410-ab35-e06eaae15ed9
Mental debugging fix: need to refresh original seg's bsp props when it is split

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2452 86ba831e-150c-0410-ab35-e06eaae15ed9
Better locality of some variable declarations, and initializations everywhere they should be needed.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2453 86ba831e-150c-0410-ab35-e06eaae15ed9
Code what should do the freein' of the bsp trees when youins is done widdit.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2454 86ba831e-150c-0410-ab35-e06eaae15ed9
osx: Added r_dynabsp to Xcode project

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2455 86ba831e-150c-0410-ab35-e06eaae15ed9