Improved randomize and wishing functions

Before, it could happen that the radio would replay a song that was recently played. This was because the randomize function took no concern to the playlist. Likewise, it was also possible to wish songs that were recently played.

I've now resolved these issues by maintaining a queue log and rewritten the scripts to prohibit selection of random songs which appear in the log. The same goes for the wishing function. Currently the queue log is maximum 10 entries.

Server down due to power cut

The server, which hosts the website and the radio, had to be turned off for a few days due to scheduled power cut. But do not fret - because it is back up again!