Version 0.7.4

* HISTORY:
* 0.7.4
*  o moved all file handling to FileManager
*  o code and comments cleaned up
*
* 0.7.3
*  o merged two branches (unknown version) with 0.7.2
*  o course colors in the UI
*  o fixed text overflow in the UI
*
* 0.7.2
*  o added saving/loading of articles to/from cache
*  o load saved articles and initialize list on app start
*  o removed unused code