NOJIRA Update de_DE Providence translation
NOJIRA Restructured installer code that processes relationship types

There was a weird bug that would cause sub_type_left or right
restrictions to be ignored for the first types in a given relationship
type list. The workaround is a little ugly but it works.

Also, some of this code was very inefficient. We now use API methods to
figure out type IDs instead of weird DB queries.
Merge branch 'master-fix' into develop