Comment pass
Add ID3v2 tag COMM frame test
Fix locateSeq one-off iteration bug
Add readTrmStr to parse null-terminated strings
Parse ID3v2 COMM frame 'lang' as null-term string
Rename spec to clarify ISO-8859-1 targeting
Remove BOM when parsing UCS-2 encoded strings
Note that lang is ISO-639-2 in ID3v2 COMM frames
Don't assume formatting rules in T-frame tests
Add tests for reading UCS-2 encoded ID3v2 tags