ticket 10030 fix - contributing file for docs repo
Proper bullet point formatting
Delegate all Makefile targets to ant

Embed and use ant-contrib so that it's possible to build on systems
without ant-contrib on the default classpath.
ant: Use ant-contrib jar directly
Merge pull request #761 from rleigh-dundee/ant-makewrap

Delegate all Makefile targets to ant
Merge pull request #759 from hflynn/rebased/develop/contributing-file

ticket 10030 fix - contributing file for docs repo (rebased onto develop)