minor readme reword
fixed reference to wrong XmlDocument location
fixed according to documentation
Merge pull request #215 from emeusel/master

Small documentation fixes
don't propagate non-nullable in subclass attributes.
remove needless call of gen_sqla_info() in sqla tests.
add default ctor tests, add support for default values.
minor.
also accomodate non-abstract mixins as bases
versioning update.
Nullify known attrs while making sure not to conceal user errors.
Update typo in comment and update .gitignore
Merge pull request #217 from mjzshd/master

fix typo and update .gitignore
Merge remote-tracking branch 'arskom/master'

Conflicts:
	.gitignore
minor
fix a final quirk in complex object ctor.
close contexts on error as well.
fix timezone decisions and improve docs in DateTime
don't log iterables otherwise the logger consumes the data.
handle generators failing mid-stream in WsgiApplication