Add possibility to read/write plural translations
make l10n libs capable of handling plural translations
Partly integrate plural translations into js
General CSS cleanup
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
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
Simplify OC_DB transaction functions
Use $connection for schema changes
Cleanup: remove code for multiple database backends
Group database connection and schema function