feat(helm): add --no-hook to helm install and delete

This also adds several tests, cleanups to the API, and removal of dead
code.

Relates to #932

docs(charts): add documentation for hooks.

Fix #872: index function should handle deleted charts correctly

feat(build): add make target for cross builds

This includes a substantial bit of unit test improvements. Also, in
order to allow us to tests command line args (which translate to
helm.Option objects), I had to add a new interface to pkg/helm.

ref(cmd): refactor status cmd

Add reference to text/template Go package doc

Closes #938

ref(cmd): refactor create cmd

ref(helm): fix naming issues from golint

ref(cmd): remove duplicate test cases

chore(*): add canonical import path annotation

fix(helm): helm search should only display only those charts with a remove boolean that is set to false

https://golang.org/doc/go1.4#canonicalimports

…since people might not be familiar with Go templates.

feat(helm): add 'helm get hooks'.

This adds 'helm get hooks' and updates 'helm get' to return
hook information.

fix(engine): change template naming

Template paths were relative to the chart that contained them, which
meant that all templates were named 'template/SOMETHING'. This made it
trivially easy to hit namespace collisions as in #933.

Template path names are essentially opaque strings so this patch simply
changes them to be qualified by parent chart.

fix(ci): ensure godir is installed for coverage

feat(ci): setup test coverage reports with coveralls.io

feat(*): add version to release

laying ground work for #690

feat(tiller): support hooks for install

fix(ci): move docker-build out of parallel step

circle ci can't seem to find the image when it is build in a parallel
container.

fix(ci): add docker-build to the parallel builds

feat(lint): support linting multiple charts