BOM symbol is not ignored

[GoogleCodeExporter]

What steps will reproduce the problem?
1. I use a UTF-8 source file with the BOM symbol at the beginning
2. I apply "source" or "read" command to the file

What is the expected output? What do you see instead?
I expect foma to ignore BOM. However, it is regarded as a normal symbol, 
resulting in errors (like "unknown character").

What version of the product are you using? On what operating system?
I am using 0.9.17 on Windows 7.

Actually, it's a really minor ussue but new users may have troubles as the 
reason is not very clear at first. Perhaps, it should be specified in the 
tutorial that one has to use UTF-8 files without BOM.

Original issue reported on code.google.com by [email protected] on 3 Mar 2013 at 3:36