... for better readability and extensibility.

According to best practice (leads to cleaner code).

Overview of changes:

 *  Added data for Debian packaging
 *  Significant infrastructure updates (MKit v0.0.10)
 *  Minor tweaks

Mostly ugly (at least how lintian sees it) but first working version.

pretty.sh assumes that mkusage is always called from a function named
`usage()` and manipulates $caller based on that.  For subcommands,
though, the convention is based on name of the binary anyway, so we can
easily circumvent that limitation.

 *  Added ability to mute debug output per module and/or function
 *  Renamed shellfudoc for consistency with rest
 *  Improved docs
 *  Improved Test suite
 *  Improved packaging

Have it pretend and demonstrate situation when two modules are used,
both following shellfu naming conventions.

Hopefully the last batch...

Turns out that read without params supports backslash escaping; that is,
`\t` gets translated to tab and `\` at the end of line connects with
next line.  Such feature is dangerous as implicit; read should almost
never be used without this parameter.

See [Bash Hackers wiki]1] for more.

  [1]: http://wiki.bash-hackers.org/commands/builtin/read#read_without_-r