[nem-en] Language support and BOM

[vc]

> BOM allows you to detect utf... which in our case makes not sense,
> since we ALWAYS read as utf8.

It's caused problem.

> Why don't you simply convert all your files to utf8?  VS handles it
> correctly, so I can see no problems - VS detects both utf8 formats,
> with and without BOM. Nemerle compiles fine also both of those
> formats.

User has the right to choose the encoding of files. And we must correctly
interpret encoding of file.

We can use utf-8 in VS templates (I already convert it to utf-8), but if
user add file in some encoding to project, we must correctly treat encoding
of it.