Merge pull request #15 from tturpen/json-utility

JsonUtil.java added - thanks @tturpen
Merge pull request #16 from tturpen/master

Metadata Field for Concrete Protobuff
killed travis stuff
bump up versions to 1.0.13 SNAPSHOT
prepare for 1.0.13
bump versions to 1.0.14-SNAPSHOT
concrete.proto revisions including requiring section to have a king, sections getting an optional label and sections getting a position identifier that indicates where in the document the section appeared with respect to other sections.