Merge branch '0.3.0'

* 0.3.0: (57 commits)
  update ChangeLog
  Regression fix for alpha channels using color cache:
  wicdec: silence a format warning
  muxedit: silence some uninitialized warnings
  update ChangeLog
  update NEWS
  bump version to 0.3.1
  Revert "add WebPBlendAlpha() function to blend colors against background"
  Simplify forward-WHT + SSE2 version
  probe input file and quick-check for WebP format.
  configure: improve gl/glut library test
  update copyright text
  configure: remove use of AS_VAR_APPEND
  fix EXIF parsing in PNG
  add doc precision for WebPPictureCopy() and WebPPictureView()
  remove datatype qualifier for vmnv
  fix a memory leak in gif2webp
  fix two minor memory leaks in webpmux
  remove some cruft from swig/libwebp.jar
  README: update swig notes
  ...

Conflicts:
	NEWS
	examples/gif2webp.c
	src/dec/alpha.c
	src/dec/idec.c
	src/dec/vp8l.c
	src/enc/alpha.c
	src/enc/vp8l.c

Change-Id: Ib202fad7825a090c3b3a5169acd171369cface47

NEWS

@@ -1,11 +1,16 @@
 - Next version:
-  * Add incremental decoding support for images containing ALPH and ICCP chunks.
   * New function: WebPMuxGetCanvasSize
   * BMP and TIFF format output added to 'dwebp'
   * Significant memory reduction for decoding lossy images with alpha.
   * Intertwined decoding of RGB and alpha for a shorter
     time-to-first-decoded-pixel.
 
+- 6/13/13: version 0.3.1
+  This is a binary compatible release.
+  * Add incremental decoding support for images containing ALPH and ICCP chunks.
+  * Python bindings via swig for the simple encode/decode interfaces similar to
+    Java.
+
 - 3/20/13: version 0.3.0
   This is a binary compatible release.
   * WebPINewRGB/WebPINewYUVA accept being passed a NULL output buffer