Add $DOCKER_ARGS and docker-args pluginhook to dokku deploy and command run.
Add a backup-check used to validate the archive.

This allows plugins to refuse a backup, before the import process starts.
Users can force the import using -f.
Merge ssh keys rather than overwriting them.
Add a backup-check to avoid reimporting apps.
Pipe no op into docker-args plugin-hooks to avoid problems when running over ssh w/o a pty.
Merge pull request #358 from dyson/DOCKER_ARGS

For #304: Add $DOCKER_ARGS and docker-args pluginhook to dokku deploy and command run.
Merge pull request #361 from plietar/backup-check

Backup check
Reenable go test
Merge pull request #363 from progrium/2013-12-03/reenable-go

Reenable go test
Add a static website test.
Merge pull request #355 from plietar/static-test

Add a static website test.
Use the node binary from the PATH.

The new nodejs buildpack has changed the location of the node binary.
Using the PATH make the test pass on both buildpacks.
refs #371
Allow tests to have a setup phase.
Add a config test.
Merge pull request #373 from plietar/tests-hooks

Allow tests to have a setup phase.
Mention LTS support & additional instruction
added post-build hook
Print datestamp before doing anything

This lets easily see if Travis' "restart build" feature is working properly
README grammar

Some confused me as I was scrolling through the docs (missing pronouns) and others were more nit-picky.
do not exit when docker fails