fixes based on code review recommendations

Previous commits:
--------
finish v2.0 model and minor fix in v1.0 model

add images v2.0 models, unittest and test data

move tests/* into cloudcafe/metatests/ to avoid namespace issues

fleshed out v2.0. model and unittests

Change-Id: I86f339e6a306b44d5c667819ac1af402e86a362b
Trying a generic approach to mock tests so assertions can be shared

- add rotating responses
- continued with mock test strategy
- move metatests to root folder

Change-Id: I1b484e3959fbea5b7e3643fd2831f44ba82e9b1c
add tox.ini file for flake8

- can be used in pre-commit hook:
`$pip install flake8`
`$cd $GIT_PROJECT_ROOT`
`$flake8 --install-hook tox.ini`

Change-Id: I9d1a71187b1b14306dcf82c7bfcf2fb09ba77e8c
add config provider and examples for images api

- edit reference.xml.config to reflect xml as marshalling method

Change-Id: I6a6392dfc306de0b57adc8006df11f3b1ce983d5
fixes based on code review recommendations

Previous commits:
--------
finish v2.0 model and minor fix in v1.0 model

add images v2.0 models, unittest and test data

move tests/* into cloudcafe/metatests/ to avoid namespace issues

fleshed out v2.0. model and unittests

Change-Id: I86f339e6a306b44d5c667819ac1af402e86a362b
add config provider and examples for images api

- edit reference.*.config to conform to configparser properties
- edit reference.xml.config to reflect xml as marshalling method

Change-Id: I6a6392dfc306de0b57adc8006df11f3b1ce983d5
Merge commit 'refs/changes/49/32749/1' of https://review.openstack.org/stackforge/cloudcafe into local-master
Merge commit 'refs/changes/26/32726/5' of https://review.openstack.org/stackforge/cloudcafe into local-master
Merge commit 'refs/changes/73/30173/9' of https://review.openstack.org/stackforge/cloudcafe into local-master

Conflicts:
	configs/images/reference.json.config
	configs/images/reference.xml.config

Change-Id: I60ccb239cc547b2da346dfd63a69e43a61260e86
Merge commit 'refs/changes/12/31512/5' of https://review.openstack.org/stackforge/cloudcafe into local-master

Conflicts:
	.gitignore
	__init__.py
	cloudcafe/images/__init__.py
	cloudcafe/images/v1_0/__init__.py
	cloudcafe/images/v2_0/models/image.py

Change-Id: I501b6f89f5b33d03d838cc6909732f9558a302c8