Merge commit '1ec484d' into PHP-5.5

* commit '1ec484d':
  - add imageaffinematrixget and imagematrixconcat
  - add affine matrix helper for translate, scale, rotate and shear
  - fix unix build
  - add new files for interpolation
  - config.m4 sync with .w32
  - add new interpolation method   . imagescale   . imageaffine   . replace imagerotate with new generic and optimized new implementations   . imagesetinterpolationmethod, to set the default interpolation to be     used with the new functions   . add imagepalettetotruecolor