Append subtypes of C

[wibeasley]

Develop a function that accepts a data frame with the RelationshpPath variable and appends these four columns.

Relationship Path	Extended Family C	Rearing C	Parent Child C	Same Generation
Gen 1 Housemates	1	? 1	0	1
Gen 2 Siblings	1	1	0	1
Parent Child	1	0	1	0
Ancle Nibling	1	0	? 0	0
Gen 2 Cousins	1	? 0	0	1

The question marks arguably are farther away from 0/1 than the other cells.

cc @smasongarrison. Discussed at the November meeting.