Merge pull request #304 from funman/master

Win32: avoid symbol lookup if UNICODE is defined
Fixed ABI breakage in TagLib::String
Rewrote ByteVector::replace() simpler
Merge pull request #309 from TsudaKageyu/fix-replace

Rewrote ByteVector::replace() simpler (fix for the issue #308)
Replaced wrongly used slashes with backslashes in some comments
Merge pull request #310 from TsudaKageyu/backslash

Replaced wrongly used slashes with backslashes in some comments
Merge pull request #307 from TsudaKageyu/string-abi

Fixed the ABI breakage in TagLib::String
Fixed warnings in MinGW
Merge pull request #321 from TsudaKageyu/nominmax

Fixed warnings in MinGW
Fixed a mail address
Merge pull request #322 from TsudaKageyu/mailaddress

Fixed a mail address