Add geometry = TRUE options to other functions?

[schmidtDETR]

Currently, get_salt() includes a geometry = true argument that allows the returned data to include shapefiles. This behavior can be improved:

1. Integrate appropriate shapefile returns into other functions? TIGRIS contains county and MSA data as well, which could be merged with CES and LAUS. OEWS data requires a bit more manipulation to match OEWS areas.
2. Don't force a shift_geometry in get_salt. That should remain an option, so that people wanting to map the data differently may do so.

[schmidtDETR]

Created branch to correct the bug element removing shift_geometry from the workflow.

[schmidtDETR]

Resolved shift_geomettry issue. Now issue can focus on enhancement for incorporating geometry=TRUE.