Change README to use project version instead of fixed snapshot version.

Signed-off-by: Kiyan Ahmadizadeh <kiyan@wibidata.com>
Update release notes for 0.3.0 release.

Reviewed by: kiyan
Update to Albacore 1.0.4 release versions
[maven-release-plugin] prepare release kiji-express-music-0.3.0
[maven-release-plugin] prepare for next development iteration