Base: Write some initial man pages

It ain't much, but it's honest work!

Base/usr/share/man/man1/md.md

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+## Name
+
+md - render markdown documents
+
+## Synposis
+
+```**sh
+$ md [--html] [input-file.md]
+```
+
+## Description
+
+Read a Markdown document and render it using either terminal
+escape sequences (the default) or HTML. If a file name is given,
+`md` reads the document from that file; by default it reads its
+standard input.
+
+## Options
+
+* `--html`: Render the document into HTML.
+
+## Examples
+
+Here's how you can render this man page into HTML:
+
+```sh
+$ md --html /usr/share/man/man1/md.md
+```