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/se-Rattvik

@@ -1,3 +1,3 @@
-# Sweden - Rättvik
+# Sweden - Rättvik
 # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
 T 530000000 8MHz 2/3 NONE QAM64 8k 1/8 NONE