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

commit: https://github.com/kijiproject/kiji-scoring/commit/f228d5dd7b48737afdabe6fd64bb9efb7664d938
kiji-scoring: [maven-release-plugin] prepare release kiji-scoring-root-0.8.1

commit: https://github.com/kijiproject/kiji-scoring/commit/5c27a1f6bdef91f8979b0dd9cebeb130edd7c1bb