Bump plugins and move to Java 7

Not sure if we want to move public projects to Java 7. If so, here's a start, otherwise close this.

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[INFO] Reactor Summary:
[INFO] 
[INFO] Flow (Parent) ..................................... SUCCESS [0.357s]
[INFO] Flow .............................................. SUCCESS [5.302s]
[INFO] Flow Sample ....................................... SUCCESS [8.967s]
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[INFO] BUILD SUCCESS
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[INFO] Total time: 15.551s
[INFO] Finished at: Wed Apr 02 19:31:16 PDT 2014
[INFO] Final Memory: 52M/451M
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