Don't show duplicate builds in "Related builds"

Dependencies

• [2] 3SQCOHZN * minor performance tweaks
• [3] NORYRBVG 50 for related builds might be a kind of low, will start with 100
• [4] HB3OHPJL hydra: in case of cached build, add link to build that built the storepath
• [*] LBNVQXUB * Build the /build stuff in a separate controller.
• [*] J5UVLXOK * Start of a basic Catalyst web interface.

Change contents

• replacement in src/lib/Hydra/Controller/Build.pm at line 86
  [2.157]→[2.157:240](∅→∅)
  − , { join => 'jobsetevalmembers', order_by => [ 'project', 'jobset', 'job'] }
  [2.157]

  [2.240]
  + , { join => 'jobsetevalmembers', order_by => [ 'project', 'jobset', 'job'], distinct => 1 }
• edit in src/root/build.tt at line 440
  [2.2034]

  [2.2034]
  + <p>The following builds are part of the same jobset evaluation that produced this build.</p>