Add possibility to read/write plural translations
make l10n libs capable of handling plural translations
Partly integrate plural translations into js
General CSS cleanup
Use !== and === in files_trashbin-app
Use isIgnoredDir()
Allow several plural forms in l10n php files
Add multiple plural forms to the php part
Fix two bugs in l10n.pl
Fix an error jenkins found
Storage: remove tests for search
Storage: remove some unneeded strict tests of mtime behaviour
Only close db connection when disconnecting, keep the connection object
Create DB Connection wrapper and DB\Adapter* classes
Move db prefix handling to Connection wrapper
Move lastInsertId to adapter classes
Move prepared query cache handling to Connection wrapper
Move limit/offset handling to Connection wrapper
Move query statement fixup handling to Connection wrapper
Move insertIfNotExist to Connection wrapper

Real implementation is in DB\Adapter* classes