empty year is "" instead of 0. closes #29
Merge /home/andy/dev/node-musicmetadata
avoid polluting strtok and Stream namespaces. closes #32
add ASF (wma, wmv) support
Merge branch 'asf' of /home/andy/dev/node-musicmetadata

Conflicts:
	lib/common.js
Merge branch 'master' into fork
Release 0.4.0