updating uncritical dependencies to latest versions.
changed Saxon-HE to a dependency from online Maven Repo
changing license to Apache 2.0, updating pom to GitHub (scm,
issueManagement)
changed license file
renamed license header file
updated command line option for Saxon
updated license headers to Apache 2.0
moved buildNumber files from config to resources
added NOTICE file using maven-notice-plugin, increased version to 0.6
updated developers section
increased json-sir version number and updated license
added licenses to sub-projects, increased version numbers
removed version numbers from 52N-related license mappings