Introducing simple user profiles (Pt.1).

Changes:
- switched routing after login
  (we now send users always beck to main-timeline)
- switched the logging of warnings to console.warn()
  (in the hope its supported by every browser)
- changed some styles, renamed some methods
- introduced two new icons
- updated README accordingly

Fixes:
- opacity from img:hover style is overriden now (CKEditor!)
- extended the functionality of the EMC RestClient
- introduced generic note-title (in detail view)
- upgraded dependency infos in preparation for nightly builds
  wher just our (yet) custom dm4-images module is missing

Features:
- Introduced editing and rendering of personal profiles
  (with show- and edit-view above personal timeline)

Pending:
- switching usernames to display_names all over (if given)
- tag-filter-view, login-menu and user-manue still interfere
  (if screen-width is not so wide needs revision)
- integrate the detail-view into the index-page (making it all ajax-single)
- Redo Layout (Add logo and support IE9, Opera)
- move more edit-related functions into a more private scope
- commit changes from here also into the ck-mathjax repository

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)