Squashed 'core/' changes from 91341d9..543f167

543f167 I like breaking the build with the smallest changes possible. (Not committing the database makes stuff hang)
64266c9 Writing cleanup time whenever a cleanup is done (also if it results in OK_NOTHING_DONE)
691d097 Update CHANGELOG.md
f2d2a46 Merge branch 'develop' of github.com:syncany/syncany into develop
aba8fab Catching uninstalled plugins when deserializing config
f701ba4 Patching status message on resumed update

git-subtree-dir: core
git-subtree-split: 543f167b8d24acc739424ad797e5dd352fab3557
Merge commit 'fea2a4eac41bafd56ecabd8c906be9db71a20939' into develop
Merge branch 'develop' into feature/issue334-prefs