Merge pull request #15 from rborer/master

Reduce onChange logging level
Clean up the context helpers, but renaming and restructuring into a single base type.
Adding archiveArtifacts and htmlPublisher
Adding logRotator
Merge pull request #17 from quidryan/master

Adding logRotator, archiveArtifacts, and publishHtml
Setting default task, for BuildHive
Adding Ant build step
Merge pull request #18 from quidryan/method_ant

Adding Ant build step
Adding junit archiving
Merge pull request #19 from quidryan/archiveJunit

Adding junit archiving
Adding jabber notification support
Merge pull request #20 from quidryan/JabberNotification

Adding jabber notification support
Adding publish scp
Merge pull request #21 from quidryan/publishScp

Adding publish scp
Fixing some documentation.
Adding downstream publisher
Adding parameterized downstream jobs
Upgrading to Gradle 1.3, hoping it'll fix a problem.
Fix misspelling of method in StepContextHelper
Adding blockOn