Updated api doc with savings charges details
MIFOSX-727: Loan Write off account not being persisted on creating a new Loan Product
Update CHANGELOG.md

for 1.11.1.RELEASE
prep for mifosplatform-1.11.1 release
Merge pull request #625 from vishwasbabu/mifosplatform-1.11.1

Mifosplatform 1.11.1
Merge pull request #624 from ashok-conflux/savings_charge_apidoc

Updated api doc with savings charges details