Implement smarter async skip via read
Implement smarter async skip via read

Original git commit by Alexander Larsson <alexl@redhat.com> at 1188399001 +0200

svn path=/trunk/; revision=850

halfline/gvfs,gicmo/gvfs,xkahn/gvfs-cmis,halfline/gvfs,thiblahute/gvfs,philipl/gvfs,thiblahute/gvfs,xkahn/gvfs-cmis,gicmo/gvfs,xkahn/gvfs-cmis,xkahn/gvfs-cmis,gicmo/gvfs,halfline/gvfs,cpatulea/gvfs,philipl/gvfs,gicmo/gvfs,cpatulea/gvfs,philipl/gvfs