Milesone is not unique in project

[g4s8]

Now we just save mileston name as id:

<milestones updated="2018-07-26T17:42:53Z" version="0.62.2" xsi:noNamespaceSchemaLocation="http://datum.zerocracy.com/0.62.2/xsd/pm/time/milestones.xsd">
  <milestone id="gh:test">
    <date>2018-07-26T00:00:00Z</date>
  </milestone>
</milestones>

that is not correct, because Zerocracy project may contain few Github repositories with same milestone names. Let's add additional attribute repo and check the uniqueness by two attributes (same as in releases.xml):

<milestones updated="2018-07-26T17:42:53Z" version="0.62.2" xsi:noNamespaceSchemaLocation="http://datum.zerocracy.com/0.62.2/xsd/pm/time/milestones.xsd">
  <milestone repo="zerocracy/farm" id="gh:test">
    <date>2018-07-26T00:00:00Z</date>
  </milestone>
</milestones>

[g4s8]

@0crat in

[0crat]

@0crat in (here)

@g4s8 Job #377 is now in scope, role is DEV

[0crat]

Bug was reported, see §29: +15 point(s) just awarded to @g4s8/z