UNICODE to UNICODE Big Endian command

This function will convert the complete file from Unicode encoding to Unicode (Big Endian) encoding.  Endian refers to the order in which bytes are stored. On Windows platforms, which are mostly little endian, UTF-16LE is just called "Unicode" and UTF-16BE is just called "Unicode (Big Endian)". This is much less confusing for the majority of people who do not work cross-platform.