Changing literal Oxygen to product key

Plus minor fixing minor issues noticed in passing.
Making references to the SDK consistent.
Remove an unreachable part from a topic - the topicref excludes developer* already.
Fix a broken link to the oracle.com website for a JDBC driver.
Review the project view topic.
Merge branch 'gcb'

* gcb:
  Review the project view topic.
  Fix a broken link to the oracle.com website for a JDBC driver.
  Remove an unreachable part from a topic - the topicref excludes developer* already.
  Making references to the SDK consistent.
  Changing literal Oxygen to product key