Converted szarp.cfg and szarp_in.cfg templates to UTF-8

+ templates for szarp.cfg and szarp_in.cfg were encoded in ISO-8859-2
Unified parsing of menu config in SCC, updated conversion header file

+ there was some mess with encoding parsing of menu options in SCC,
  now unified according to new conversion interface.
+ added new conversion functions L2S, S2L, L2U and U2L to header file.