Adds scalastyle SBT plugin

- See http://www.scalastyle.org/rules-0.5.0.html
Upgraded jackson-case-class-module

- Added test for default healthCheck.path value
- Fixes #593
Merge pull request #604 from mesosphere/ccm-upgrade

Upgraded jackson-case-class-module
Merge pull request #568 from mesosphere/scalastyle

Adds scalastyle SBT plugin
fixes a flaky test
Added default value for task version
Merge pull request #615 from mesosphere/task-version-default

Added default value for task version
Setting version to 0.7.0-RC4
Setting version to 0.7.0-SNAPSHOT
Merge pull request #614 from mesosphere/wip-fix-flaky-test

fixes a flaky test in DeploymentActorTest.scala
Setting version to 0.7.0
Setting version to 0.7.1-SNAPSHOT
Concludes merge from release branch.
fixes #479 - Recover running deployments on failover or restart