Make 'spree' line in Gemfile friendly to bundle.local configs

Conflicts:
	Gemfile
Begin putting in place a real testing framework for this extension

Conflicts:
	spec/models/active_shipping_calculator_spec.rb
Make active_shipping line in Gemfile friendly to bundle config local.active_shipping
Replace the stock_location_id instance variable.

Fixes #98
Only run 1.9.3 and don't spam IRC