v0.7.1 - Constant Manatee Attacks

Small release with two new small features fixing relatively minor issues that nonetheless deserved attention:

• Add --db-pool-size and --max-connections options for configuring the number
  of idle db connections kept around and the maximum number of db connections
  to make to the server. It isn't particularly useful if you're not using one
  of the SQL backends.
• For locally stored cookbook files (which is currently all of them), goiardi
  now generates the URL to the resource from the currently configured
  hostname. This fixes an issue where if you uploaded a cookbook and then
  changed the goairdi server's hostname, the URLs to download cookbooks would
  break.