added json changesets functionality
added changeset tests
lots of cleanup, documentation, and json changesets improvements
removed unused schemas
fixed version number utils, fixed change set tests
improved error handling when getting the version from the jar file
improved change sets to handle null values better, removed version from stations.schema
moved jsonupdater, split up string and json methods better
improved getting the current version when updating from change sets
fixed version util get jar
Merge branch 'update-gradle-to-1.11' into schema-changesets-69448908
incremented version to 0.7
removed amstationid changeset, added version utils, fixed tests
added toString in versionutils
Update README.md
Merge pull request #69 from spidasoftware/schema-changesets-69448908

[Delivers #69448908] Added changesets and other fixes