Make XML files valid and canonic

[gerritbruening]

http://dev.digital-humanities.de/ci/view/Faust/job/faust-schema-tei-340/Validation_20Results/faust-tei.html

Validation

• <rdg resp="#wa-app" type="substantial">glühnden</rdg> recte substantive

Consistency

• https://faustedition.uni-wuerzburg.de/new/xml-query/?folder=transcript&xpath=%2F%2F*%5Bnot%28self%3A%3Atei%3Anote%29+and+%40type%3D%22editorial%22%5D&mode=xml
• listChange seems to be ordered by default.