1. running test using django session mix test case.
2. fixed 99% of the tests that were missing.
3. adding circle ci for that.

…one.

…ed clear session command.

* logs

* refactored to use struct log and added a log warning if session data
size reaches a certain limit.

#2)

* version upgrade.

* refactored to reduce the size we are using for reading and writing to dynamodb.

* version upgrade

# Conflicts:
#	dynamodb_sessions/__init__.py

…nd their size.