New post includes markdown header with title

Link blog in README

Update README with final notes

Improve test script

Reorganize README instructions

Change lowdown to cmark in README

Change cmark-string->sxml to cmark->sxml

Use cmark as dep

Fix build posts on missing posts.scm, better tests + test cleaning

Fix link extension for atom.xml

Fix sfz description

Implement help command and update descriptions

Simplify read-post with read-string
Simplify write-posts with pretty-print
Split up build post for profiling/debugging

Fix serve CLI option

List simple file servers for golang and rust in README

Install via egg file instructions

Remove spiffy from listed dependencies on README

Create egg file

Simplify publishing step by removing need for filename

Now prompt with unpublished posts

Update README

Implement reverse command