Merge pull request #11 from Luis-Cruz/develop

Rewrote getUsedLanguage() to be consistent with mlsString.getContent()
[DSI Releaser] prepare release v4.0.4
Merge branch 'release/4.0.4' into develop
[DSI Releaser] prepare for next development iteration
Use fallback to any available content when the MLS has no content available in the requested locale. Simplified presentation of used language when it does not coincide with the users current locale or when it should be explicity displayed.