Add hostile to set the hosts file when developing locally.

Resolves #261
Update README instructions for deployment.
Update README with get-secrets instruction.
Move Ansible inventory files into an inventory directory.

Resolves #264
Re-enable buttons when HTTP requests fail.

Resolves #219.
Return users to the same page upon logging in.

Resolves #30
Resolve issue where 404 would not work for logged-in user's Gistbooks.

Resolves #267