wip new stamp duty model
remove view code relating to stamp duty %
Revert "add copy for stamp duty legislation change"

This reverts commit f0f89ac9c9ede75408650d0e67ca22e72c466eae.
update stamp duty bands table
update stamp duty copy
update stamp duty cucumbers
remove stamp duty percentage from view
update meta tags
update stamp duty copy RE legislation changes
Updating js stamp duty for new legislation
remove unused methods
remove old cucumbers
better cucumbers for stamp duty

cucumbers now run with and without javascript
also additional cucumber around recalculate
add tax percentage to stamp duty
add JS tax percentage to stamp duty
update to use new rspec syntax
Merge pull request #221 from moneyadviceservice/legislation-change

Legislation change