Small reorganization of the code, in preparation of using other clients as well (especially, XBMC).
Use of backend server
The system is now dependant on few parameters, moved in a config file on the server
Configuration is now no longer dependant on a static path
Added compatibility for python 3
Changed name of heartbeat url; added changes from VS for project file
Moved stop definition to a configuration file.
Improved some error handling, in case of errors in configuration file.

Note that configuration file must be in UTF-8 (without BOM). On non-windows platforms may not work.
Additionally, this change may not be compatible with python 2.
Tentative for improving compatibility to Python 2 (untested, though)
Renamed scraper to scraper_mpk
Added responsive layout for some resolutions:
- HD ready (1280*720)
- FullHD (1920*1080)
- Common laptop (1366*768)

Phones are not supported (yet), as they would require a major change in the layout (e.g. a tab for each single stop, or at least for left and right)
Added example stops.ini (needs some documentation, though!).