message: Updated link-sytax documentation
diff: * Link to package: `[label]($package)`
  * Link to topic: `[label]($package:topic)`
  -* Link to class: `[label]($package.class)`
  -* Link to method: `[label]($package.class.method)`
  +* Link to class: `[label]($package.class)` or `[label]($package/class)`
  +* Link to method: `[label]($package.class.method)` or `[label]($package/class.method)`
  +
  +Note: leaving [label] empty will default to a label of 'class.method' or 'topic'.
  ## Linking to Overview/Learning to or from Overview/Learning
  