Fixed funky indentation errors
Allow view classes to be found under Object

This patch allows users to define their view classes in the
"global" namespace instead of requiring them to be under a "Views"
module. For example, the following is allowed in a Sinatra app:

require 'sinatra'
require 'mustache/sinatra'

class Index < Mustache
end

get "/" do
  mustache :index
end
Merge pull request #114 from mjijackson/get_const_fix

Rescue NameError when Views module isn't found