kiji-model-repository: [maven-release-plugin] prepare for next development iteration

commit: https://github.com/kijiproject/kiji-model-repository/commit/327804aaca108b2aec2e6fff8af4db9eed930f25
kiji-model-repository: [maven-release-plugin] prepare release kiji-model-repository-root-0.3.0

commit: https://github.com/kijiproject/kiji-model-repository/commit/d37daf34626a7453281efb3d54e19e0ba3c40eb5