Prepare for awestruct

Awestruct may use its own Rakefile. Now that I don't want to generate
rake tasks by hand, I had better delete the existing one.
Merge branch 'master' of github.com:celadevra/expoundite.net
Merge branch 'master' of github.com:celadevra/expoundite.net
Merge branch 'master' of github.com:celadevra/expoundite.net
Add awestruct to gemfile

and ignore .lock file