Add spec due date for monthly checks and changes
Set up spec_due_date

* this is the due date we'll bill with... it will be changed
  each month if needed and only if your due date is bigger then
  28.
* Its based on the problem dealing with dynamic months and a static
  due date
Working on late fee

* Refactor code to allow for specific
  payment to be paid while charging a late fee
  is late
Create new time to check against
Update late fee charge
Fix late fees, add to database

* And more
Create helper for rent price
Update rent to dollars
Merge pull request #43 from jeffAwesome/add-late-fee

Add late fee