Store localizable text literals in labels

Empty label files added (issue #5)
Store localizable text literals in labels

Localization of MToolsDocumentBuilder class (issue #5)
Store localizable text literals in labels

Localization of MToolsDocumentBuilder_XMLSS class (issue #5)
Store localizable text literals in labels

Localization of remaining objects (issue #5)
Merge pull request #11 from mcarrowd/feat_n5

Store localizable text literals in labels (feature #5)