Add autoloading file

Load files needed to use trailblazer in an omakase stack
Update README.md
Make autoload use ruby autoload instead of require
Add trailblazer module to autoloading file
add todo.:
add contract inheritance test to assure options like :virtual are properly handled, @celsofernandes.
Fix behavior on when using responders on destroy operation

After #destroy AR returns the object with #destroyed? true, frozen but *true*
so responders consider as a valid object and redirect to model_path(@model.id)

If it was destroyed, we pass the model instead of operation, and it returns
correctly to models_path
Add #persisted? method to operation

Its no good controller access the model, so added #persisted? to operation
this way controller dont need to access model to work with respond_with
in a destroy action
cleanup.
fix tests.
use public reform for now.
add test/rails to test Responder.
add rake rails for rails tests.
add tests for #respond.
remove unneeded files.
Merge branch 'fix_respond_to_with_destroy_operation' of https://github.com/fernandes/trailblazer
test Responder destroy semantics.
lock to sidekiq 3.1 since we want to run ruby 1.9 tests.
Merge branch 'add_autoloading_file' of https://github.com/fernandes/trailblazer
remove dev log.