hydra: description at changes section

Dependencies

• [2] JBUTIGW7 hydra: description at changes section
• [3] XHK7IGYI * hdyra: show last succeeded build and changes since on build status summary if build has failed
• [4] 22JB5HNE make changes section more compact/readable
• [*] J5UVLXOK * Start of a basic Catalyst web interface.

Change contents

• replacement in src/root/build.tt at line 189
  [3.29]→[2.0:56](∅→∅)
  − Changes compared to last successful build:
  [3.29]

  [3.29]
  + Changes compared to last successful build:<br/>