test mandatory elements
test mandatory subelements
test mandatory element attributes
Merge pull request #299 from plq/master

Document Updates. Contuniation of #298
Merge branch 'master' of github.com:arskom/spyne
use mandatory wrapper from `spyne.model.complex`
Merge remote-tracking branch 'upstream/master' into test_mandatory
test mandatory attribute schema
unittest.assertRaises is a context manager only since python 2.7
Merge pull request #297 from satyrius/test_mandatory

Test mandatory input elements validation
changelog update