ca and es _ASKDU translation
Tidy up some tests

- Add @group SystemTest
- Resolve some styling issues
Merge pull request #141 from SemanticMediaWiki/tests

Tidy up some tests
Update LanguagesAccessibilityAndIntegrityTest.php

Replace precursor language code "no" by "nb" for norsk bokmål
Create SMW_LanguageNb.php

Move contents from SMW_LanguageNo.php to this file (replacing the precursor language code "no" by "nb" for Norwegian Bokmål and thus avoiding MediaWiki fallback functionality for the translations within this file)
Delete SMW_LanguageNo.php

Delete file after having moved its contents to the "SMW_LanguageNo.php" file (replacing the precursor language code "no" by "nb" for Norwegian Bokmål and thus avoiding MediaWiki fallback functionality for the translations within this file)
Translation update by the SMW community

Credits go to Even Thorbergsen. Add the missing translations for the special properties.
Update SMW_LanguageNb.php

Make clear that the Bokmål variant of Norwegian is localised in this file
Update RELEASE-NOTES.md

Add issue concerning the transfer from "no" to "nb" for Norwegian (Bokmål variant)
Update SMW_LanguageNb.php

Fix class name issue detected by the code test runs
Merge pull request #139 from toniher/master

ca and es _ASKDU translation
Merge pull request #143 from SemanticMediaWiki/i18n

Consistently make "nb" the language code for Norwegian (Bokmål variant)