Remove dependency on iconv.  Some embedded platforms either do not have
it or do not support the utf8 to utf16le mapping, so libmms can either
not be compiled for these platforms, or will fail at runtime.

https://sourceforge.net/p/libmms/bugs/15/
Fix connecting to certain mms streams.  Ensure that the header is parsed before
any data chunks are received.

http://sourceforge.net/p/libmms/bugs/13/
Release 0.6.3