V2 files for simplified_expenses_checker

https://www.pivotaltracker.com/story/show/56226256
Fix whitespace errors
Refactor - name total variable to match docs

Clearer to follow too.
Split the bullets in simplified expenses

Remove business cost from simple total as now below the total

https://www.pivotaltracker.com/story/show/56226256
Simplified expenses checker content changes

https://www.pivotaltracker.com/story/show/56226256
Update total copy for normal expenses

This isn't in the story but without this change the page looks
inconsistent.

See the comments on the story:
https://www.pivotaltracker.com/story/show/56226256