Closes #196

Fix Mimetype Error

For when the mimetype of a file we are serving is unknown

catch Exceptions in method dispatch in api.py

Avatar improvements

closes #59

Improve 401 Error Logging

add advanced datatree search query

Add origin tracking to files

Serve schemas

add new ENV required variable

Add archiving functionality for containers

Fix docker bootstrap example

- Update bootstrap.json to bootstrap-dev.json to reflect new convention.
- Move bootstrap-data.sh to PRE_RUNAS_CMD var to reflect it's need to be run as root due to pip install.

Add a config property to containers called "propagated_properties".
All PUT updates to these properties will update all objects down
the hierarchy. Update requests that mix propagated_properties with
other properties will not currently be allowed, but modifying the logic
to only push the relevant properties of the payload down the hierarchy
tree is an option. Still to be done: proper permission and schema
validation.