hack/PACKAGERS.md: libdevmapper
Fix typos in Vagrantfile
Updated Introduction link

Previously the introduction link pointed to www.docker.io. That
did not seem to make a lot of sense to me so instead I pointed it
at:

http://www.docker.io/learn_more/
Reimplement lxc-ps

Instead of calling lxc-ps in top endpoint, we reimplement it by
calling ps and filter for pids running in a given container.
Fix and re-enable TestGetContainersTop
Update binaries.rst

Along with the kernel requirement, you need a working copy of lxc.  When trying to start using "/docker -d", received error 'initapi: exec: "lxc-start": executable file not found in $PATH'
Allow to use -H unix:// like -H tcp://
Improve TestParseHost
Factor cache-probing logic out of buildfile.commit() and CmdRun().
Record added-tree sha256 in buildfile.CmdAdd, probe and use cache.
Add testcases for ADD caching, closes #880.
Add self to AUTHORS.
Add CHANGELOG.md entry for ADD caching.
Added warning when browsing master. & no longer hides alternative versions.
Always copy dockerinit locally, regardless of whether our docker binary is static, because even it might get deleted or moved/renamed
Add dockerinit SHA1 and path to "docker info" when debug mode is enabled
Allow packagers to specify a custom dockerinit lookup location via DOCKER_INITPATH in dynbinary

Only necessary if distro policy dictates that the path deviate from the paths already listed in utils/utils.go - please refrain from using it otherwise.
Fix "go tool cover" detection to only add -cover and -coverprofile if we both have cover support in Go, and if we have the cover tool downloaded
Add "-a" back to our "go build"
Purge more hack references to Go 1.1.2 (since it requires backported archive/tar patches now, and Go 1.2 is _widely_ packaged successfully)