put the list of guides first in the documentation

Also expound on the main docs a bit

Fixes #72
better format for crosspost links

Had to rearrange the post headers for this

Fixes #70
add rel next/prev to pagination links

rel="next" and rel="prev" give the browser some metadata about how
the series of pages works.

Fixes #66
deploy now performs 'git push'

We should look to reduce the number of steps necessary in updating the
site some more.

Fixes #57
release v0.012