rake load command now works

First successful rakefile for deploying images to a server.
rake deploy command works
delete all.html layout

Deprecated.
adjust permalinks to prevent 301 redirects, testing new image uploading front-matter
added rake optimize command
updated Requirements in readme
image urls specified in site config and post front matter
Merge pull request #18 from opattison/automation

Automation (resolves #3 and #5)