Fix plugin generator so plugin tests pass

[brian-kephart]

Fixes #799 so that a generated plugin's test suite can be run.

Adds two lines to the top of the plugin's config/routes.rb:

require 'plugin_routes'
require 'camaleon_cms/engine'

Replaces this line of the plugin's gemspec:

s.add_dependency "rails"

with:

s.add_dependency "camaleon_cms", "~2.0"

The rest of the changed lines are just whitespace. The previous version of the file had an extra indent on a whole file's worth of lines, which I changed as I was adding to the top of the file.