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.
Merge pull request #230 from spotify/drewc/whyhelios

Add a why Helios? section to README
[maven-release-plugin] prepare release 0.8.24
[maven-release-plugin] prepare for next development iteration
Merge pull request #229 from spotify/drewc/joblink

Add ability to output a message when a job is deployed.
Allow other options for the host picking strategy for TempJobs

can choose:
* random (the default)
* onerandom - randomly pick a host and deploy all jobs there
* deterministic - seed the random number generator so it
   "randomly" picks the same hosts across test runs that it
   did in previous runs
* onedetermistic - seed the random number generator so it
   "randomly" picks the same host on which it deploys all
   jobs across test runs.
Merge pull request #226 from spotify/drewc/hostfilterpickone

Allow other options for the host picking strategy for TempJobs
Make it so HELIOS_HOST_FILTER isn't ignored if HELIOS_DOMAIN specified
Add bit about remote java debugging
Refactor build and release process

Release Helios with just mvn deploy and skip tests.
Upload debian and jar artifacts by inheriting them from previous builds.
Merge pull request #232 from spotify/drewc/fixHF_HD

Make it so HELIOS_HOST_FILTER isn't ignored if HELIOS_DOMAIN specified
Merge pull request #233 from spotify/drewc/debugging-java-containers

Add bit about remote java debugging
skip ITs in jenkins profile
Output correct version from pom
Don't deploy to host that is down