NWUKFS-384: (VAT1) VAT Income References 
* Temporary placeholder to display Vat Income Rate document on coa -
Remove once tags for vat created
NWUKFS-384: (VAT1) VAT Income References 
* Refactor BO member names
* Document dd
* BusinessRule to validate percentages
* New Vat message bundle
* Overwrite isActive() on BO
Merge branch 'master' of https://github.com/nwukuali/nwu-kfs.git