Ensure *See also* header key override is respected.
0.8.213
allow help middleware to be configured via configure()

I'm unsure why `help` is unable to be configured in this manner, unlike many of the other middlewares.  It seems `help` was not originally middleware?

There's a conditional regarding the description.  Current behavior is to grab the description out of the `Command` instance if `help.description = true` in the config.  So, we check for that value, and if it's present, we pull the description out of the instance.

I moved a couple default strings into the configuration defaults as well.
Merge pull request #84 from boneskull/master

Do not execute function when checking its name
Merge branch 'master' into develop
0.8.214
Remove arguments.length return statements.
0.8.215
Support rc onload in conf and configure().
0.8.216
Remove description: true test case.
Merge pull request #85 from boneskull/help

allow help middleware to be configured via configure()
Remove description true test.

Prefer action name for help config action function.
0.8.217
Declare help.action property.
0.8.218
Improve sort order in *cmd* style help.
0.8.219
Fix description for --help.
0.8.220