* Implement localization loader L10N.

Localize a few strings in index.php for testing.

* Determine language from HTTP_ACCEPT_LANGUAGE header.

* Fix parsing of available languages for localization.

* Fix parsing of language translations (for localization).

* Fix function L10N->find_language

* Change variable naming to comply with conventions.

* Add remaining localize calls in index.php.

Add more localization strings.

* Fix styles to prevent check mark from being hidden.

* Handle exception in case localization couldn't be loaded.

* Add module localization support.

* Fix detection of core module in L10N->load

* Remove module specific localization from core l10n file.

* Fix determination of module name in L10N->load.

* Add localization files for more modules.

* Ignore l10n directory in modules path.

* Add support for dropdown lists in module settings.

* Add support for saving dropdown menus.

* Fix regex for recognizing dropdown option lists.

* Fix dropdown list regex not recognizing active option.

* Fix typo in ncp-launcher.php

* Workaround for jquery's 'find' method not working. //TODO: Find proper fix.

* Fix parsing of dropdown lists when updating config.

* Load language setting from config if available.

* add ncp-provisioning to SD card images

* Add intellij config to gitignore

* Fix bug when loading language from nc-webui config.

* Remove redundant language definition.
Replace umlauts by html special char expressions.

* Change selected option markup from `*<option>*` to `_<option>_`.

* Remove ide metadata.

* Add translations for ncp-app nc-backup.

* Add translation hooks to ncp-launcher.php

* Fix type in translations for nc-backup

* Remove translation hooks for field contents in ncp-launcher.php