[tor-bugs] #19574 [Metrics/metrics-lib]: Clean up codebase before 1.3.0 release

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#19574: Clean up codebase before 1.3.0 release
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     Reporter:  karsten              |      Owner:  karsten
         Type:  enhancement          |     Status:  new
     Priority:  Medium               |  Milestone:
    Component:  Metrics/metrics-lib  |    Version:
     Severity:  Normal               |   Keywords:
Actual Points:                       |  Parent ID:  #19398
       Points:                       |   Reviewer:
      Sponsor:                       |
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 We just ran out of tickets to be merged into 1.3.0, and I'd like to take
 this opportunity to make some general changes to the codebase before
 releasing.  Things like:

  - moving all Java sources to `src/main/java/`,
  - adding a checkstyle task and fixing most of the style issues found by
 checkstyle, and
  - updating the copyright notice to 2016.

 (I already started working on these things and will post a branch in a
 minute.)

 What other bulk updates should we make before the 1.3.0 release?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19574>
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