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adding console command to generate javascript translation files based on existing php translation files
read server side translations from json files

remove translation.php

Added addTranslations and fixed de.js file

Fixed de.js to use OC.L10N.register() and use to correct expected
format.

Added JS unit tests for OC.L10N class

Include translations JS script for all apps

This commit will make the supported DBs for installation configurable within config.php. By default the following databases are tested: "sqlite", "mysql", "pgsql". The reason behind this is that there might be instances where we want to prevent SQLite to be used by mistake.

To test this play around with the new configuration parameter "supportedDatabases".

When doing a PROPFIND on the root and one of the mount points is not
available, the returned quota attributes will now be zero.

This fix prevents the expected exception to make the whole call fail.

It's only reasonable to have proper type hinting here which might even help us to catch bugs.

Otherwise the function is executed n times which is a lot of overhead

There is not much sense in having these files marked executable, we should avoid that.

* fix #7484
* use UID, css, and div instead of span

Actually query() returns value of the type "mixed" (as is also stated in the interface) - this is purely there to make our IDEs and Scrutinizer happier.

Remove \OC\DB\ConnectionWrapper, have \OC\DB\Connection implement \OCP\IDBConnection directly instead

There is no need to refer to the absolute path here if we can use the relative one.

Conflicts:
	lib/private/templatelayout.php