Update changelog and remove some debug stuff

git-svn-id: http://vapoursynth.googlecode.com/svn/trunk@509 f9120d27-2007-6f97-8312-0f4ebfa7710f
Maybe fix the test cases

git-svn-id: http://vapoursynth.googlecode.com/svn/trunk@510 f9120d27-2007-6f97-8312-0f4ebfa7710f
Update installer for r19 release

git-svn-id: http://vapoursynth.googlecode.com/svn/trunk@511 f9120d27-2007-6f97-8312-0f4ebfa7710f
Apply nodame's small fixes to vspipe

git-svn-id: http://vapoursynth.googlecode.com/svn/trunk@512 f9120d27-2007-6f97-8312-0f4ebfa7710f
Fix previous commit

git-svn-id: http://vapoursynth.googlecode.com/svn/trunk@513 f9120d27-2007-6f97-8312-0f4ebfa7710f