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--- 2017-06-10 Release 7.26.2 ---
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Among a variety of bugs fixed, the patch corrects a critical error in
BoT triangle mesh ray tracing. For improved performance, it also
changes the default frame buffer display behavior to fully buffer ray
tracing images instead of displaying them incrementally. A variety of
MGED commands see improvements too with 'ls' now supporting listing
objects by their on-disk size and the 'simulate' command applying
forces on objects (e.g., gravity) with greater ease. Not yet
complete, there is a new interface being developed for resolving
overlaps more efficiently, currently under development and usability
testing with select users. Lastly, a number of dependencies were
upgraded, including Tcl/Tk, in order to patch security vulnerabilities
and address portability issues.
* upgraded Tcl/Tk from 8.5.9 to 8.5.19 - Sean Morrison
* fixed background color setting in MGED - Cliff Yapp
* upgraded libpng to version 1.6.29 - Cliff Yapp
* upgraded zlib to version 1.2.11 - Cliff Yapp
* reduced 'shade_inputs' flipped normal reporting - Sean Morrison
* numerous 'simulate' command enhancements and fixes - Jon Engbert
* fixed rtweight .density file loading on Windows - Cliff Yapp
* fixed dsp handling of invalid uniform binary objects - Sean Morrison
* fixed brlman problem with viewing benchmark man page - Cliff Yapp
* fixed name of dbfind man page (was listed as 'find') - Cliff Yapp
* added -H option to ls for human readable size reporting - Cliff Yapp
* added -S option to ls command for size based sorting - Cliff Yapp
* improved 'loadview' command view script handling - Sean Morrison
* fixed TIE raytracing for zero thickness BoTs - Cliff Yapp
* added Wavefront OBJ File->Open GUI support in Archer - Cliff Yapp
* fixed attr show error printing large attribute values - Cliff Yapp
* fixed rt support for lights created prior to rel 6.0 - Sean Morrison
* fixed infinite loop bug in when using shadow lights - Sean Morrison
* removed man pages: erase_all, export_body, vrmgr, dall - Cliff Yapp
* fixed MGED 'c' command crash when run with bad arguments - Nick Reed
* added manual pages for the 'brlman' and 'man' commands - Cliff Yapp
* improved gdiff default grid spacing and tolerancing - Cliff Yapp
* updated brlman to support browsing all page categories - Cliff Yapp
* added support for .rtwizardrc configuration file - Cliff Yapp
* renamed MGED gdiff grid spacing -t option to -g - Cliff Yapp
* updated MGED gdiff default drawing options to -l -r - Cliff Yapp
* removed MGED gdiff -R option, now default behavior - Cliff Yapp
* replaced obsolete 'g_diff' manual page with 'gdiff' - Cliff Yapp
* improved 'keep' error message when file is not created - Cliff Yapp
* improved rtwizard window sizing and "RtWizard" titling - Cliff Yapp
* brep command attaches .brep suffix instead of _brep - Sean Morrison
* changed ogl & wgl framebuffer delayed write behavior - Sean Morrison
* upgraded freetype to version 2.6.5 - Cliff Yapp
* fix rtedge foreground/background color options - Jon Engbert
* support rt -C colors specified as 0-255 or 0.0-1.0 - Jon Engbert
* fixed xpush bug leaving stray top-level objects - Nick Reed
* removed MGED wrapper 'mged.bat' batch script on Windows - Cliff Yapp
