Remove wp.me rule.

It redirects to non-functioning URLs in some cases.
Fixes #748
Add python-pip to install-dev-dependencies.

Also add paranoia flags to pip command in case pip <1.5 is in use.
Merge pull request #773 from jsha/better-setup

Add python-pip to install-dev-dependencies.
Merge pull request #772 from jsha/no-wp-me

Remove wp.me rule.