Not qualified namespace schema fixed

Merge pull request #16 from goetas-webservices/unqualified-ns

fix namespace handling for "unqualified elements" schema mode

2016-12-20

Merge pull request #14 from goetas-webservices/impr

minor code improvements

Fixed inheritance issues

Merge pull request #7 from goetas-webservices/union-extension

handled buggy class extension

v0.2.1

fixes on base types generation