docs(related): add KubeCon 2016 videos

close #2023

docs(related): add cog-helm to 'Additional Tools'

fix(helm): add message if release deleted successfully

docs(wrapping_up): fix broken link to Tips and Tricks

kubernetes has explicit delete message that user can know resources being deleted for sure,
suggest also add this behavior to helm, as it is too 'quiet' for deletion operation right now.

Closes #2018

fix(kube): fix wait and recreate

ref(*): remove error if no tests found on test cmd

fixes #2006

Add --url option to helm serve

fix(helm): resolve symlinks when loading chart

Possible fix for #1639

Mention saltside/await in misc related projects

feat(helm): allow disabling plugins

chore(*): bump kubernetes v1.5.3

* resolves #1973

This adds an environment variable, HELM_NO_PLUGINS, that can disable
the plugin system from loading plugins. It provides a general way for
turning the plugin system off.

Closes #1624

This PR is to add --url flag for helm serve, so that
urls in index.yaml will be changed to the corresponding value.

Add ToJson and FromJson template functions

fix(local-cluster): fix missing variable option

set $HOME in tiller container to /tmp

docs(chart_repository): fix bug in code example

docs(named_templates): fixed broken template

Adds "Workflow Umbrella Chart" article to related.md

`unbound variable` error occurs when docker-machine is not used.

Closes #1967

docs(index): Move doc index into a separate file.

docs(related): add CI/CD docs

fix(helm): fix broken cache paths in repositories