0.1.8

Added:

• Database clients now merge collections across databases so records across
  public and private databases can be put together. This is in
  client.chained_db.

• Blacklist for db files (eg. travis.yml) the default (if no blacklist is
  specified in the rc is to blacklist ['.travis.yml', '.travis.yaml']

• Schemas and exemplars for the collections.
  Database entries are checked against the schema, making sure that all the
  required fields are filled and the values are the same type(s) listed in the
  schema. The schema also includes descriptions of the data to be included.
  The exemplars are examples which have all the specified fields and are
  used to check the validation.

• Docs auto generate for collections (if they were documented in the schema).

Changed:

• all_docs_from_collection use the chained_db to pull from all dbs at
  once. This is a breaking API change for rc.client.all_documents
• App now validates incoming data against schema

Deprecated:

• Mongo database support is being deprecated (no chained_db support)

Fixed:

• Properly implemented the classlist replace operation.
• Fixed issue with classlist insertions using Mongo-style API
  (deprecated).
• Properly filter on course ids when emailing.
• fsclient dbs explicitly load 'utf-8' files, which fixes an issue on
  Windows