Dev: Remove outdated comment in configure.ac
Low: Fix some minor spelling mistakes and some other small tweaks to the rsctest tutorial
Medium: Rewritten help subsystem

Simplified the help implementation in anticipation
of the larger UI patch.

 - Removed help index
 - Paginate with colors if possible
 - New faster help file parser
Dev: Refactor the help module

Simplify the help module even further, removing
the HelpManager class. The module now exposes
four functions:

 - help_overview()
 - help_topic(topic)
 - help_level(level)
 - help_command(level, command)
Low: Append command information to level help
Low: Add contextual help command
High: UI makeover

Work-in-progress patch to split ui.py into multiple files.

* command.py -- Implements the UI level base class plus
a set of helper decorators for declaring commands.

* ui_utils.py -- Utility functions for the UI classes.

* ui_tree.py -- Holds the UI root.

* ui_root.py -- Similar to TopLevel from ui.py

* cmd_status.py -- wraps crm_mon.

* ui_*.py -- Implements the UI levels.