[nem-en] Language support and BOM

[vc]

It's inconveniently to use Russian strings in Nemerle source files.
By default VS treat files as encoded in current encoding. In my PC it's a
1251. ncc tarte files as UTF-8. It's result to trash instead Russian text.

Suggest read files as array[byte] and convert it's content to appropriate
encoding on the basis of Byte Order Mark (BOM):
http://en.wikipedia.org/wiki/Byte_Order_Mark