more consistent name,
 refactor stbi_load_main to preserve old code,
 support float HDR path,
 minor bugfix

bump version and update credits;
minor whitespace changes;

GCC 4.7 gave the warning "signed and unsigned type in conditional
expression" because the ternary operator mixes signed and unsigned
integers. Fixed by casting to unsigned inside the "if" branch instead
of casting the result of the entire conditional.

fix incorrectly-named assert, attempt to fix (char) cast warning (tricky since char's signedness is unknown)

this variable was causing a warning while compiling with gcc.

tweak docs

Also ran a bunch of test cases to make sure the IDCT and H2V2
resamplers were correct.

Put progressive JPEG AC decode logic back the way I wrote it originally (I changed it to match jpgd when I was trying to figure out why it didn't work);
add STBI__ prefixes to internal SCAN_ enum;
strip unused function arguments for progressive funcs;
tweak release notes;
forget to git commit frequently so these would all be in their own commits;

stbi__ prefix on two functions that were missing it

fix long-standing bug where gifs were just broken AFAICT

tweak credits
tweak revision history
remove trailing whitespace

fix a few old error messages

some documentation cleanup

add missing STBIDEFs to a few functions;
update documentation with full 1.49 info even though most isn't implemented yet

  support using inline asm for cpuid

YCbCr:
  switch SSE code to constants that match old C;
  create C version that is same as SSE;
  tiny optimization(?) of SSE