Merge remote-tracking branch 'origin/master' into v0.2

* origin/master:
  Update HISTORY.md
Use globs, set nullglob, and remove stdout redirection for import
Merge branch 'master' into v0.2
Merge pull request #333 from rhy-jot/2013-11-20/backup-find-to-glob

backup:export: find -> glob
Merge branch 'master' into v0.2
Add a version command.

The git tag/revision is saved when running "make install", and can be
displayed using "dokku version".
Add stable installation instructions
Use a hardcoded version if git revision is not available.
Add the date and time of installation if version is hardcoded.
Merge pull request #334 from plietar/version

Add a version command.
Merge branch ‘master’ into v0.2 and update DOKKU_VERSION
Use $DOKKU_ROOT instead of $HOME
Bump to RC3
Add a list of known issues.
Fix commands, the easy way.

Don't use pluginhook to run the commands hook, just run all the scripts
in a loop.
Don't explicitly specify streams to docker run.

Now that "docker run" always has an stdin, we don't need to explicitly
specify stdout and stderr.
Remove known issues and add note about ForceTTY

These issues are fixed by this PR.
Close stdin before running the backup-export hooks.

This avoids hanging when we're not in a pty.
Bump to RC4
Add an empty help message to the nginx-vhosts plugin.

Not doing anything just destroys the help message coming from previous
plugins. Run cat to forward stdin into stdout.