Default to function name if none specified.

Supports both @command and @command().
Merge pull request #11 from ganjianwei/default-fn-name

Default to function name if none specified.
Adds support for capitalized single letter arguments.
Merge pull request #12 from chuegle/master

Adds support for capitalized single letter arguments.
Adds first doc line to command list.
Merge pull request #13 from chuegle/master

Adds first doc line to command list.