progress, but does not yet work.
remove unneeded code from scenario
update doc string to reflect that its used in generate params.
aws provider now just uses boto to communicate with CloudFormation service.
remove awscli as dependency.
add in exmaple helper functions from example code.
added in stub code that could be used in the future.
remove commented out imports
Cleaning up PEP8 warnings

Confirmed that aws/boto driver works with iam-poc

still doesn't work with my branch of nepho-example, but this is good
enough to merge
Merge pull request #135 from huit/feature/aws-boto-only

Feature/aws boto only
Compatibility changes for Cement 2.1, global scope

Various changes to accomodate Cement 2.1.  Using hooks for registry
loading and scope setting.  Fixing various scoping corner cases.
Merge branch 'master' into feature/integrate-scope

Conflicts:
	nepho/cli/base.py
Fixing some UNIX path issues, resolves #140
Merge pull request #141 from huit/140-fix-unix-paths

Fixing some UNIX path issues, resolves #140
Merge pull request #139 from huit/feature/integrate-scope

Rewritten scope functionality should work with all the various corner cases