Upgraded to the SBT 12.2 jar and set the build to use 12.2.
Adeed the README template.
Edited the README.
'Added the writeReadme task to the build.'
'Attempted fix of a very spurious bug that happens during publishing.  The PackageManagementPlugin artifactName was causing one file to be overwritten for each of the three artifacts (docs, jars, srcs) when they are packaged.  The same file was then published to each of the three Artifactory hives.  Because they aren't always packaged in the same order the docs or sources were sometimes published as the compiled jar.'
Merge branch 'feature/sbt_12.2_upgrade' into develop