ADDED Javadoc.
CHANGED - Code improvements added (more defensive behaviour).

Signed-off-by: Michael Grammling <m.grammling@external.telekom.de>
ADDED testcase for the I18nProvider service.

Signed-off-by: Michael Grammling <m.grammling@external.telekom.de>
Merge branch 'i18n' of https://github.com/qivicon/smarthome into i18n