Add testNamespacesWithSemanticLinksOnTravisCustomNamespace

Test differences between $GLOBALS['smwgNamespacesWithSemanticLinks'] and
Settings::newFromGlobals()->get( 'smwgNamespacesWithSemanticLinks' )
Add testNamespaceSettingOnExampleIfSet
Clean-up of SemanticMediaWiki.php
Merge pull request #46 from SemanticMediaWiki/setup

Clean-up of SemanticMediaWiki.php and add NamespaceCustomizer