clean up comments in stock_service_spec
add rspec gem to development
add application_helper_spec
rename isadmin? to is_admin?
add failing current_user spec
add redirect to sservice, remove from is_admin?
fix some comments
switch if to unless in Stock model
refactor StockService using parse_body
refactor StockService, Stock model; redefine parse_response
add failing tests for bad stock value, delta
finish tests for stock value, delta
refactor stockservice specs
update ctrlr specs