Simpler flow

Remove all remaining estimates (#82)

* Remove all remaining estimates

* Tweaks

* Fix tech type in spec

Remove flight estimates (#81)

Remove hotel estimates (#80)

* Remove hotel estimates

* Cop

Remove endpoints (#79)

Remove unused estimates endpoint (#77)

Update to 2.1.1 for issuance_type and disclaimers (#76)

API version 2.1.0 See https://docs.patch.io/#/changelog for changes (#73

)

* API version 2.1.0 See https://docs.patch.io/#/changelog for changes

* Use swagger version 2

* Update expected test results for estimates

* Update changelog

API version 2. See https://docs.patch.io/#/changelog for changes (#72)

Add /estimates/ecommerce API support (#71)