C++ compatibility
Removed unused function
Ability to write PNG file only up to predefined size
--skip-if-larger option
Add -msse2

Fixes #65
Less constness

Fixes #64
Make Q=100 really mean lossless

Fixes #63
Removed use of lib's private macro

#67
Add getters to libimagequant.c; add speed holder
Declarations for getters. Add return value.

This commit adds declarations for the getter functions added
previously and adds an omitted return value to one of the getters.
Merge pull request #71 from benkasminbullock/master

Add getters to the library
Add getters to manual
Document liq_get_max_colors
Add some things to the manual
Merge pull request #73 from benkasminbullock/master

Documentation of getters
Comment
Check result
Carefully select include dirs to avoid png.h/libpng version mismatch
Removed Perl file
Merge remote-tracking branch 'origin/master' into cpp

* origin/master: (35 commits)
  Removed Perl file
  Carefully select include dirs to avoid png.h/libpng version mismatch
  Check result
  Comment
  Add some things to the manual
  Document liq_get_max_colors
  Add getters to manual
  Declarations for getters. Add return value.
  Add getters to libimagequant.c; add speed holder
  Removed use of lib's private macro
  Make Q=100 really mean lossless
  Less constness
  Add -msse2
  --skip-if-larger option
  Ability to write PNG file only up to predefined size
  Removed unused function
  Version bump
  Tell libpng to expand all types to support RGB+tRNS images
  convert pointer to integer before performing arithmetic
  Discourage use of libpng 1.2
  ...