Merge pull request #146 from kwilcox/master

Fixes issues with WFS SRS parameter and general Test cleanup
don't install tests into site-packages/tests
Merge pull request #147 from SiggyF/setup_tests

Don't install tests
check existence of href attribute

The star (DCP/HTTP/*) selects every element (i.e. comments) which may not have the href attribute
Merge pull request #148 from menegon/patch-2

check existence of href attribute
Add a function to append namespaces to etree Elements.  fixes #143