expose the entire provider on the worker_ctx
MockProvider -> DummyProvider
flake
let log handler do formatting
rename instance_factory -> worker_factory
pep8 in doc examples
pyflake
Merge remote-tracking branch 'origin/master' into expose_providers

Conflicts:
	nameko/containers.py
Merge pull request #111 from onefinestay/expose_providers

expose the entire provider on the worker_ctx
Merge pull request #120 from onefinestay/fix_header_warning

let log handler do formatting
Merge pull request #121 from onefinestay/rename-worker-factory

Rename worker factory
Merge remote-tracking branch 'origin/master' into incorrect-signature

Conflicts:
	nameko/containers.py