directly assign expenditures to final demand for SLG expenditures

[bl-young]

resolves #50

This removes the need for sector mapping by applying the same line from the State and Local Government Expenditures dataset to all (relevant) sectors from the national final demand. That is, every sector uses the same state allocation.

Initial line items are indicated in code:

  codes <- data.frame("FinalDemand" = c("F10C", "F10E", "F10N", "F10S"),
                      "Line" = c("68",
                                 "58",
                                 "58",
                                 "58"),
                      "Description" = c("Other direct general expenditure",
                                        "Capital outlay",
                                        "Capital outlay",
                                        "Capital outlay"))

[bl-young]

@WesIngwersen let me know if this aligns with your thinking

[bl-young]

Pulling this in, as discussed.