What changed in EDuke32, build by build

Set union ['] and difference [;] for sector selection in Mapster32; probably fix for crash on clipshape-init; replace tabs in doc/build*.txt with three spaces.

a.m32 corruption checker: also handle out-of-range picnum

Use posix_memalign in fork/exec midi player when not using nedmalloc. This fixes compilation in this case for me.

Works around a bug with newer NVIDIA GL drivers where creating a GL context

Fixes quite a few nasty bugs with the new clipping code, including the crash. Clip shapes are now loaded from _clipshape0.map through _clipshape9.map (no break like when loading tiles, just see if each is present). Mapster32: insert some safety code for sprites with sectnum<0. Because this is still a bad thing, have the m32script corruption checker catch this and run it periodically from EVENT_DRAW2DSCREEN. Also draw such sprites in 2D mode with a blood-red color, and make them draggable. Remove set[sector,wall,sprite] commands.

New sprite clipping for hitscan; crude debugging code for tracing down the crash that Commander is getting and I can reproduce only in real Windows with the synthesis build.

Fix crash. Reason was obsolete code.

SDL and menu joystick fixes by NY00123 (thanks!).

New CON command 'clipmovenoslide', doing the same as clipmove but stopping at collisions before sliding calculations. Fixes a problem with Mapster32 where names.h was tried to be read before setting up the search path.

New CON commands:

mapster32 fixes: aiming crash in polymer, more accurate aiming in polymost + calibration/replacement crosshair via "r_preview_mouseaim", 2 other crashes; fix "S" in tile selector, make read-only variable overridable with "script_expertmode", misc. beautifying.

msvc compile fix

Fixes various issues with selecting: sectors and duplicating them many times in a row, sprites and then deleting some of them (also adds set union ['] and difference [;] to RSHIFT); adds the ability to move all selected sprites in the XY plane in 3d mode with SHIFT-LMB and align to the grid in an absolute fashion with CTRL.

Fix wrong interpretation of SPREXT_NOTMD that would cause it to assume the flag was set whenever any flag was set, causing the models to switch on and off in Duke Plus with Polymer.

Fixes crash in 2d map drawing where sector[-1] was accessed; added commands a2xy and ah2xyz to m32script, coded 2d preview of swinging and sliding doors; added "samprate" setting to configuration, useful if the default one gives jittering/echoey audio

Search for named tile in tile selector ('S'); various bugfixes (among other things with PR-override vars)

bugfixes; mark tiles in tile selector for later grouping (press SPACE on a tile); a.m32: convert to CRLF and add [xyz]vel query in 3d mode (Alt-KP1), also different keys for Polymer override var tweaking; some CRLF->LF in LF-only files.

Makefile cleanups: fixed building with GCC 3, made tabs into spaces where outside command context; Windows: make startup window stay 3 seconds if there was an error -- this way you won't mistake yourself forgetting to copy game data for a crash *d'oh*

Fixes compilation for now. Now if my executable would start...

A bunch of m32script additions, fixes and general stuff, among them: local vars/arrays, inline quotes and prettier error messages.

Fix some crashes with weapon sounds inappropriately set to -1 in the cons