fix(gitignore): ignore .DS_Store files

Fix text alignment in dm help output.

chore(examples): add example nginx chart

On OSX, a few things we have (notably, docs) cause OS X to generate
.DS_Store caches. These should not get checked into Git.

Add chart configuration

* The explanation of 'manifest' was one tab to far intended.

ref(Makefile): Check for flake8

remove unused variable

ifix(manager): test for create deployments

This is a first pass at using the new test stub to test HTTP services.

fix(manager): add stub for context with Manager

This adds testing fixtures for the manager. It includes a stub context
that has either default or stub implementations for each object.

WIP: Frame out repo package and modify charts package to support chart download

fix(Makefile): Install Glide with go get -u

Add vim scratch files to gitignore

go get -u is used to install and handle the other dependencies,
such as gox, golint, and vet. Use the same method for Glide.

add repo cmds to helm client

* use pkg/httputil instead of func in helm client

fix(Makefile): add flake8 to bootstrap

flake8 support was recently added, but the bootstrap didn't check or
install it.

fix(manager): use decoder

ref(*): remove punctuation at end of error