feat(2063): Better 'helm list' visibility into state of pending upgrades

Fixing typos in requirements.yaml part

fix(helm): fix flag parsing once and for all

fix(dep): Fixes out of date dependency info

The help text for `helm dep` contained out of date info about
referring to a chart repo by name vs. URL.

fix(helm): fix `helm get` subcommands

This correctly sets up the tunnel for `helm get values`, `helm get
manifest`, and `helm get hooks`.

Closes #2617

fix(helm): support HELM_HOME during plugin loading

fix(tests): fix sorting hooks test flake

closes #2630

fix(helm): load home from flags during runtime

Fix a bug causing 'helm depndency update' to delete required charts

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