Fixed escaping strike-through
Extracted static TestHelper
Updated dependencies
Fixed PHP-DI's fuckup
Fixed INSTALL.md
Changed storage of executed upgrades to DB
Dropped sqlite support; changed DB testing
Fixed tests broken by abstract test case rollback
Changed upgrade report to be more real-time
Improved verbosity of upgrades
Added manual sequencers
Banned a few characters from usage in tags
Changed snapshot to JSONs
Fixed default tag category
Added PHPunit.xml
Added "created" snapshot operation
Fixed redirection after tag renaming