Made failure to find tempjobs cleanup file ok

Can show up in test logs if users run more than
one TJ test concurrently, and since this isn't
a real error, it's just suppressed for now.
Merge pull request #218 from spotify/drewc/spurious

Made failure to find tempjobs cleanup file ok
Fix build issue w/fetching key to install Docker

The old method to retrieve the Docker repository key has stopped working.
Use `apt-key adv` instead.
Merge pull request #220 from spotify/rohan/travis

Fix build issue w/fetching key to install Docker
Do not print no match warnings in -q quiet mode.
Merge pull request #222 from rydenius/master

Do not print no match warnings in -q quiet mode.
Add user who created job/deployed job
Merge pull request #221 from spotify/drewc/addUser

Add user who created job/deployed job
[maven-release-plugin] prepare release 0.8.22
[maven-release-plugin] prepare for next development iteration
Added Some adjunct info to README
Removing unused dependencies

Found a couple dependenices which aren't being used. The jsr305 dependency
in helios-testing was causing a problem for one of our users because it
conflicts with a lower version they are using. Since we're not using it,
might as well remove it and not force them to exclude it in their pom.
Merge pull request #224 from spotify/drewc/comm

Added Some adjunct info to README
Merge pull request #225 from spotify/rculbertson/unused-deps

Removing unused dependencies
Use dashes not underscores in tempJob prefix

TemporaryJobs uses the tempJob prefix as the registration domain.
Depending on the registration plugin you are using, containers may
find each other by looking up SRV records in this domain. Previously
the domain contained underscores, but this caused problems for some
users because they tried to use the domain in a URI object. The URI
object does not correctly parse a string which contains underscores
because they are not allowed according to RFC 2396. The problem goes
away if we use dashes instead.
Merge pull request #227 from spotify/rculbertson/temp-jobs-invalid-uri

Use dashes not underscores in tempJob prefix
[maven-release-plugin] prepare release 0.8.23
[maven-release-plugin] prepare for next development iteration
Add a why Helios? section to README
Add ability to output a message when a job is deployed.

This is useful to possibly output a link to a place to
view logs for the job, if you had such a thing.