Some file contains some things that might happen in RDoc, or might not

=== 3.11

* Reload the RDoc tree from an RI store
  * Re-run generators
  * Parse only changed files (like in ruby)
* Page of Glory (or Shame) in HTML output showing documentation coverage
  statistics.
* Link to the parent-class implementation of methods that use super
* Add direct accessor to RDoc::Options to RDoc::Task
* Remove Public in HTML output if there are only public methods
* Method markup support for rd documentation
* Improve SIGINFO handling
* Global variable support
* Page support for ri

=== 4

API changes to RDoc

* Remove global state
* Remove RDoc::RDocError
* RDoc::TopLevel#add_method should automatically create the appropriate method
  class rather than requiring one be passed in.
* Remove #comment= from Context subclasses in favor of #add_comment
* RDoc::CodeObject
  * Move into own namespace
  * Rename TopLevel to File
  * Rename Context to Container
  * Rename NormalClass to Class

=== Crazy Ideas

  * Auto-normalize heading levels to look OK.  It's weird to see an <h1> in
    the middle of a method section.
