uses ldpath gem to get context property's values based on ldpath in config for the property
add context_mapper_service which fetches the context for each result and adds it to the result hash
Remaining Work after this PR:
expand values that are URIs to include URI + label (will be in later PR)
figure out why some ldpaths do not parse (handles this gracefully, so will be in later PR)
ldpath gem loads (and re-loads) a new graph many times over when the data is available in the passed in graph. Need to explore performance improvements for ldpath.
Adds:
Remaining Work after this PR: