Fix typos in Active Resource README
Fix typos in Active Resource README

1776/activeresource,delameko/activeresource,maclover7/activeresource,yui-knk/activeresource,SweeD/activeresource,om-nishu-trantor/activeresource,rjordan/activeresource,Shopify/activeresource,rails/activeresource,wyattisimo/activeresource,peterjm/activeresource,eileencodes/activeresource,repinel/activeresource,chadzilla2080/activeresource