Key/ Value Lists; "Percent" type values now supported

A new "Percent" type value has been added to ISKeyValueList.

You can get and set Percentage values using:

• GetPercent
• SetPercent

This is now used in auditing records, including:

• Account Default Interest Rate Change
• Account Interest Rate Change
• Account Minimum Payment Change
• Account Other Interest Rate Change
• Account Type
• Settings such as Minimum Payment Percent, Startup and Ongoing Interest Rates
• Element
• Account Ledger "Less" percent