Returning the type of the filepath in str instead of the id
Merge branch 'master' of github.com:qiime/QiiTa into data-id-to-str
Updating doctests
Making the raw_data_id a primary key again...
Merge pull request #259 from josenavas/data-id-to-str

Data id to str
ENH: Add functions to summarize metadata stats
changes for ontologies
Merge pull request #262 from teravest/ontologydbchanges

changes for ontologies
DB Modifcations for study creation

- Made two columns nullable in study table (number samples collected/promised)
- Added affiliation column to study_person to reduce likelihood of name
  collisions
Add unique constraint to study_person
Add affiliation property to StudyPerson class

also changes lookups to be based on name/affiliation since that is the unique
constraint
Add affiliation to test db population script
Fix typo in MANIFEST.in
Merge pull request #264 from adamrp/fix_manifest

Fix typo in MANIFEST.in
API: Change the name of the functions
ENH: Cast from defaultdict to dict
ENH/BUG: Change datetime objects to strings
TST: Add corresponding tests for util.py
DOC: Add docstrings for added functions in util.py
Fix tests, add tests for affiliation

Modify study and command tests to expect new affiliation argument