Simpler-documentation-template

Adopted from Edmund Weitz's documentation-template package. This version removes a bunch of hard-coded Weitz-specific stuff, and that's about it.

CL-USER> (ql:quickload :alexandria)
To load "alexandria":
  Load 1 ASDF system:
    alexandria
; Loading "alexandria"

(:ALEXANDRIA)
CL-USER> (ql:quickload :markdown.cl)
To load "markdown.cl":
  Load 1 ASDF system:
    markdown.cl
; Loading "markdown.cl"

(:MARKDOWN.CL)
CL-USER> (ql:quickload :simpler-documentation-template)
To load "simpler-documentation-template":
  Load 1 ASDF system:
    simpler-documentation-template
; Loading "simpler-documentation-template"

(:SIMPLER-DOCUMENTATION-TEMPLATE)
CL-USER> (simpler-documentation-template:create-template
          :alexandria
          :target "/tmp/alexandria.html"
          :abstract-html (markdown.cl:parse
                          "
# The Alexandria Package

An example demonstrating how to export documentation for a package
using the `ALEXANDRIA` package."))
; No value
CL-USER> ;; Point your browser at /tmp/alexandria.html to see the results.