0.2-RC1: attempt to fix mathjax rendering-update issue.

Changes:
- moved edit-functions out of scope
- attempt to solve a mathjax rendering-update issue

Pending:
- current layout currently does explicitly not support IE9, IE10 and Opera
- move more edit-related functions into a more private scope

Note:
Installation depends on DeepaMehta 4.1.1-SNAPSHOT as of commit:
ca61964a27e6757848e638c3bafc9374c6aff45c

Documentation:
https://www.eduzen.tu-berlin.de/software-komponenten (German)
https://www.eduzen.tu-berlin.de/zur-notizen-webanwendung (German / Get User Account)