Squashed 'libertree-frontend-ramaze/' changes from de20d86..30b6bb4

30b6bb4 replace require_relative with require

git-subtree-dir: libertree-frontend-ramaze
git-subtree-split: 30b6bb4e0ec8cbebf5d477197da28f777e97c155
Merge commit '3b5042494a4b2f4163d55ddde3aeb1d448eccf94'
Squashed 'libertree-backend-rb/' changes from 84e0fdb..bf0db11

bf0db11 try to catch and log all other errors, then exit
6d393f4 catch more exceptions

git-subtree-dir: libertree-backend-rb
git-subtree-split: bf0db11860fceaa9a11e65817f70388c952e4372
Merge commit '363eaccf5eb508e593578a4d23a6893082f86d52'
Squashed 'libertree-model-rb/' changes from db509fc..22e5d4d

22e5d4d more initial job retries

git-subtree-dir: libertree-model-rb
git-subtree-split: 22e5d4d61b62ca5071c344b69931d59b8c31b79e
Merge commit 'b85c9941407cd27d1fcd5725542f04800b2a3cc2'
increase versions of frontend and backend