overall whitespace & encoding fixes

patch from Matthias Schwarzott:
- use utf8 everywhere for files & file names

additionally by me:
- remove empty lines at the beginning of the files
- remove any control character (< 0x20) except \n and \t
- remove trailing whitespace
- exactly one newline at the end of the files
- remove junk from dvb-t/au-Melbourne-Upwey

dvb-t/de-Kassel

@@ -29,4 +29,3 @@ T 642000000 8MHz 2/3         NONE        QAM16      8k        1/4       NONE
 
 # Phoenix, NDR, MDR, WDR
 T 746000000 8MHz 3/4         NONE        QAM16      8k        1/4       NONE
-