update travis transforms
add comments to default verbfile
clean up `base` utils
make the `comments` helper async
use `base` helper for `docs`
adds `nickname` transform`
update built-in extensions
remove junk
externalize code for comments helper
minor edits to deprecation notice, comments.
adds `matter` middleware for parsing front matter
run verb
0.3.8
Merge remote-tracking branch 'origin/v0.3.0' into v0.3.0