[Fixes #2345] Quick fix for handling files with BOMs in them.

[acattaneo88]

Fixes #2345

I've got the idea here. I've run some tests with differently encoded files (clean, UTF-8, UTF-16 LE, and UTF-16 BE) and everything seems to work correctly.

The linked page and the comments in the code should be self-explanatory.
I don't know how solid this is, but I think it simple and stable enough to be easily merged into the main develop branch.

Also, this is my first PR... :-)

[Dunbaratu]

I'm de-merging this and putting develop back where it was, and re-opening this issue.
This fix broke KSM files because it applied the change to ALL file reads, even the ones that need to read raw bytes as-is.
The fix has to happen at a "later" time during the reading procress, after it has been determined that the file is plain text and not binary.