switch from mockito-all to mockito-core, to ease dependency management.

see
https://code.google.com/p/mockito/wiki/DeclaringMockitoDependency#mockito-core_VS_mockito-all
change jsr305 to optional dependency.
update <version> in README.md
Merge branch 'master' into version-1.1.0
update README to tell released date
[maven-release-plugin] prepare release worksap-parent-1.1.0