replaced tabs with space in _imaging.c
Significant performance improvement of `alpha_composite` function.
approximate test for lossy image writing
py3 as well
Precision improvement. ≈60% performance lost
speedup. divisions replaced by shifts.
Merge pull request #158 from wiredfool/maxblock

JpegImagePlugin sets bufsize for optimized images
Merge pull request #157 from wiredfool/webp_tests

approximate test for lossy image writing
Merge pull request #156 from homm/master

Performance improvement of alpha_composite function
Precision improvement. No performance affected.
Merge pull request #159 from homm/master

Precision of alpha composite. Again.
≈20% faster, 2 times more precisely (0.17% difference against 0.37%)
added tests to cover save of four different png transparencies
Merge branch 'master' of https://github.com/python-imaging/Pillow
Explitly import JpegPresets from the PIL package
Merge pull request #163 from ronaldoussoren/master

Issue 161: import JpegPresets from PIL
Merge pull request #162 from d-schmidt/master

added tests to cover save of four different png transparencies
fixed duplicate dpkg
Merge pull request #170 from wiredfool/dpkg-arch

fixed duplicate dpkg
fix for if isinstance(filter, collections.Callable) crash. Python bug #7624 on <2.6.6