Provide a class for keeping track of the Javadoc lookups, so this is not buried in code (so much).
get the one instance
return a link to the documentation for a java signature. For standard library things, this goes to Oracle's website. For other things, this goes to the Autoplot/Das2 javadocs. Java8 http://docs.oracle.com/javase/8/docs/api/java/io/File.html#createTempFile-java.lang.String-java.lang.String-java.io.File-
given a class name, what are fully-qualified class names which match?
add the location of the javadocs for the given path. The path should be / separated, not period separated.