Add more data for savings

Problem/Motivation

Sorting is not really possible with strings(well it is but sort is not natural). Add savings percentages and prices as int value without formatting. Also opens some new templating possbilities.

Steps to reproduce

Proposed resolution

Remaining tasks

Do it
Also add some styling enchancements to the new amzwidget template

User interface changes

API changes

Data model changes

Two new database fields int.