Add tests cases for orphans in /api/field* enpoints
Filter/log orphans on /api/fields/ and raise error on /api/fields/#/
Add tests for concepts GET enpoints
Add test for the ConceptFieldResource GET enpoint
Add test and fix for orphan in ConceptFieldResource
Add orphan checks and tests for all concept GET enpoints

The behavior of each enpoint was designed and is tested against the
expected behavior outlined in this comment:
https://github.com/cbmi/serrano/issues/51#issuecomment-21205122.
Fix multiline string in orphan log error message
Use indices in format strings to support python 2.6
Use shorter accessor for iterator
Remove redundancy in checking the embed param
Use shorter accessor for iterator over concept fields
Use inclusive query to avoid orphans
Combine orphan logs to the orphan check methods to remove redundant loops
Use inclusive query to avoid non-queryset haystack objects
Use fixed log messages with specifics in the extra argument
Use the pk instead of the object itself in orphan logs
Add select_related() to prevent additional field lookups