Add DEx phase 2 view and controller
Define routes for DEx phase 2 pages

Conflicts:
	www/index.html

Conflicts:
	www/js/app.js
Add DEx phase 2 overview placeholder
Fixed sidecar template.
Added DExOverviewController and fixed view
Fixed DEx Phase 2 Sale view
Ensure integers for currencyIds and compare appropriately selectedCoin
Simplify the form to just enter data
Implement new definition of the ModalManager
Display total fees correctly
Added tx 21 support on the backend
Fixed variable name on the backend
Removed minimum validation from the currency identifier fields