KFSTP-1453 - Invoice Template and Dunning Letter Template - rename "Access Restricted" field to "Restrict Use by Chart/Org"

- KFSTP-1461 / KFSTP-1526 rename label on templates
- KFSTP-1543 / KFSTP-1560 rename access restricted field in template code
Merge pull request #54 from bhutchinson/kfstp-1453

KFSTP-1453 - rename "Access Restricted" on Invoice and Dunning Letter Templates