ref(tests): simplify kind sorter test

Add the "APIService" kind to the installation sort order

fix(docs): run docs generator

fix(semver): Prerelease number comparison issues

In prerelease numbers there was the potential for number comparison
issues. For example, 99 being greater than 103. This is now fixed.

feat(helm): add -a flag to 'helm list'

There's 'helm get values -a' already. I always try to use 'helm list -a'
spontaneously.

Allow deletion of a previous values file key

Test that the coalesced key is properly removed for all YAML null syntax options, but not for empty string

- Note that this covers all YAML null syntax options:
  ref: http://yaml.org/type/null.html
- Note that we do a nil comparison because the encoding/yaml package parses
  YAML properly and any variation of null, Null, NULL, or ~ is converted to nil
  by the time we get here.

feat(*): use kubernetes 1.7

Adds charts in "charts\" directory to dependencies

This ensures that APIService resources are installed last and
uninstalled first

Remove mention of the Service type from the ingress documentation

Capitalize 'helm' text in init.go.

[scripts/get] makes sudo an optional dependency

feat(helm): Correct capitalization and punctuation for all user facing text

ref(helm): consolidate vars() function

$EUID is readonly, so it should be save to test against it.

Thanks for the tip @thomastaylor312 !

Reduce indent in code block

Remove confusing 'if' from install.md

charts.md updates

The "if" might confuse reader

Avoid using $* multiple times

If the execution user is already the root user, this avoids requireing
sudo to be installed within the environment. Which might helo in CI
environments.

Updating docs to prioritize `requirements.yaml` over `charts/` directory.

As `requirements.yaml` is the recommended strategy, let's document that first to make sure no one jumps the gun and goes ahead to implement manual deps via `charts/` just because they didn't read the whole section.

Fixed helm test sample.