New API methods

I think I've found a few new API methods that would be great to add to the main methods, (https://dearinventory.docs.apiary.io), that would benefit others:

1) API method to pull a list of all available Sales Representatives, like on the front-end under a Sale > Accounting Details, without having to specify a specific sale/customer.

2) API method to pull a specific data structure model, (Sale), without data. This would allow me to pull the structure for a Sale without any data attached so that I can list/view the available fields.