Refactored InvoiceApiController GetAllInvoices to return a paged query
Merge pull request #805 from rustyswayne/1.4.0-lists

Refactored InvoiceApiController GetAllInvoices to return a paged query
Starting new function to merge filtered and unfiltered customer listings on the Customer List page.
Merge remote-tracking branch 'merchello/1.4.0-lists' into 1.4.0-lists