Cosa è cambiato in EDuke32, build per build

fix centering of y-flipped wall sprites. (Case D in test_tileoffsets.)

make flipping closer to classic.

fix floor sprites with y flipping by removing special-case code.

Fix two possible signed left shift overflows.

texcache.c: use Bfilelength(), fixing Linux build.

Fix a warning and uncomment something I accidentally left commented during testing

Add an experimental shading mode to Polymost for .art tiles, in which extra textures are allocated for each shade level based on the classic mode shade tables. Enable with r_usetileshades 1 (disabled by default). This uses a lot of memory and is still very WIP (a lot of the shading is completely wrong at this point).

Fix issue with Polymer checkbox in startup window, as reported at http://forums.duke4.net/topic/2961-paper-cuts-minor-bugs-and-annoyances/page__view__findpost__p__158208

Classic rotatesprite: fix second assertion failure documented in prev. commit.

build.c: fix strcpy() with overlapping arguments.

make 'corruptcheck tryfix ?' (or '??') not require c. number range.

for some nextwall/nextsector corruptions, suggest making wall white.

Mapster32 corruptcheck: on nextsector/nextwall oob, suggest making wall white.

Mapster32 corruptcheck: if some members out of MAX bounds, signal level 5.

Revert to spherical shading; it's not like you could look up in classic anyway.

Fix interaction between ART mapping and lighting.

Finish Polymer cancer mode and enable by default.

reading of map-text prototype.

move readintostr() into defs_common.lua, fix an oversight.

MSVC build fix

Fix Makefile fuckery.

osd.c: Fix OSD_StripColors() with empty input string.

fix oob read of frame buffer when leftmost vline has a mirror.

Fix one more 1<<31 calculation, remove one unneeded cast.

I am not a smart man. Fix startup window hangs with grpinfo files.

Fix model HUD weapons not showing in Polymer, introduced in r3717.

Fix GTK build

Fix two bugs found by Clang's undefined behavior sanitizer.

Fix debugging builds with Clang 3.2 and up.

Fix TARGET sprites used as switches, introduced in r3679.

In G_LoadAddon(), remove inner 'struct grpfile *grp', fixing uninited access.

Fix two harmless warnings and reindent one switch block.

Fix startup problems stemming from SelectedGRP = "" ending up in eduke32.cfg

Revert an awful stupidity I committed in r3700.