(PDB-816) Unstringify facts

This patch removes the fact stringification, now that we have all the backwards
compatible end point changes merged in.

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-718) Fact path endpoint

This implements a "fact-paths" endpoint that returns list of fact paths/types
according to the specification here:
https://docs.google.com/a/puppetlabs.com/document/d/1vWE6tBmsPmMIYKQWV8Pwes_NIR9lEMTYjUH8zJ_AlMI/edit?pli=1
Merge pull request #1039 from wkalt/ticket/master/pdb-718-fact-paths-endpoint

(PDB-718) Fact path endpoint
Merge pull request #1040 from kbarber/ticket/master/pdb-816-unstringify-facts

(PDB-816) Unstringify facts
(PDB-808) *DO NOT MERGE* fix paging for factsets

This pull request enables the full range of paging options on the /factsets
endpoint.