kiji-checkin: [maven-release-plugin] prepare release kiji-checkin-1.0.4

commit: https://github.com/kijiproject/kiji-checkin/commit/72fb6128418b0120d26c894b686907e24f9dce8c
kiji-checkin: [maven-release-plugin] prepare for next development iteration

commit: https://github.com/kijiproject/kiji-checkin/commit/7e13bd2987fda9dd85dd5d23cf4bc23a04f724d3