Pass C++ exceptions through the structured exception handler.

(Appears that C++ exceptions in VS2012 still use the SEH
infrastructure. The exception code is 0xE06D7363, which it seems you're
just supposed to know.)
Make 3d helper camera yaw and pitch explicitly float.

It's too easy to get "can't overwrite int with float" otherwise
(assuming that conversion is deliberately omitted, which might be
reasonable).
Add rough and ready GUI slider.

It works like a container; you put whatever object(s) "inside", and
the slider draws a coloured background behind them indicating the value.
(It then also tags on a gui_text showing the exact value.) The return
value of gui_slider is the new value.
Add rgbafromhsv function.
Replace b2_debugprint with b2_debuginfo. Display is up to the script.
Commit junk.
Add new builtins: tan, vscale.
Add some new gl functions.
Split GUI slider into int and float types.
Add note about what this is. Commit updated lobster.exe.
Add bullet 2.82, verbatim.

https://bullet.googlecode.com/files/bullet-2.82-r2704.zip
Update .gitignore.
Add generated Bullet projects. Add VS junk to .gitignore.
Fix declarations of GL functions.
Rename physics to box2d_physics, so that there's room for bullet too.
Add placeholder bullet physics file.

(Had to remove the DEBUG_NEW stuff from stdafx.h, as the #define
stopped bullet being able to define its own operator new.)
Remove mistakenly-added .sdf file.
Change Bullet CRT to match lobster's.
Remove mistakenly-added .suo file.
Add some skeleton Bullet code. Give some box2d vars prefixed names.