[x] Create BusinessType class in TradingLicense.Entities
[x] Create BusinessType model in TradingLicense.Model
[x] Create BusinessType Controller in TradingLicense.Web/Controllers
[x] Create BusinessType View in TradingLicense.Web/Views/Master
[x] Create ManageBusinessType View in TradingLicense.Web/Views/Master
[x] In edit BusinessType page, we can link more than one RequiredDoc related to the BusinessType and the relationship saved in BTLinkReqDoc table. List all Reguired Docs and put checkbox beside it.