Revert "app-emulation/docker: bump to v1.3.1"

This reverts commit 87efde004420ce93bca42d531d140d05150e44ba.
Bumps docker-1.3.1.ebuild -> docker-1.3.0-r1.ebuild.
Merge pull request #954 from crawford/docker

Revert "app-emulation/docker: bump to v1.3.1"
docker: bump to 1.3.2

Note: built from patches so final git tag from upstream will differ from
what we are using here.
app-emulation/docker: add --insecure-registry flag

This is a temporary workaround to allow people to transistion into 1.3+
smoothly. This sets --insecure-registry=0.0.0.0/0 to maintain backward
compatibility.
coreos-base/coreos-cloudinit: bump to v0.10.8