closes: #1362

feat(helm): add canary option to init command

fix(helm): allow entries to be merged into index

To install the tiller canary `helm init --canary`

feat(helm): add kubeconfig context switching to init command

Between Alpha.4 and Alpha.5 there was a change in the indexing logic.
This prevent indices from being appended to (because those index files
were often broken). This change allows the user to explicitly merge an
existing index and a generated index.

Closes #1334

- decouple tunnel from kube client
- add context switching for init cmd
- add unit tests for installer and init command
- refactor installer and remove unused code

docs(chart_repositories): document correct index example

feat(helm): add kubeconfig context switching

bug(tiller): correct release statuses on rollback

docs(developers): require glide 0.12.0

The previous index.yaml example was missing a few fields, notably the
'created' timestamp.

Closes #1348

Correcting similar issue as the one with UpdateRelease
(#1137) for RollbackRelase

bug(tiller): set status correctly in performUpdate 

Handling release status updates on errors better
resolves #1137

ref: #1310

Fixed broken link from "chart.md" to "charts.md"

docs(repo): update repo index docs to show new flags

ref(*): add pkg/releaseutil.

fix(helm): ignore dotfiles in charts/ directories

fix(helm): prevent 'helm history' from segfaulting

An release that does not contain chart metadata cannot print its chart
name/version. This fixes a bug found in the wild where a release did not
(for reasons yet unknown) contain a chart.

Closes #1348

fix(helm): remove unused consts from client

ref(helm): add new line after repo remove msg

Const variables defined in client.go weren't used
anywhere.

Ref #953

This causes 'helm dep [up|install]' to ignore files in charts/ that
start with either a dot or an underscore. It also changes the
chartloader to ignore those files.

Also, if a 'helm dep up' does not find a charts/ directory, it creates
one.

Closes #1342

feat(tiller): add optional grpc tracing

This adds the `--url` flag to examples.

Closes #1343

fix(k8s): Update to latest Kubernetes release

fix(Makefile): allow overriding the version for canary builds

fix(tiller): when delete fails, mark release as deleted

closes: #1127

fix(Makefile): explicitly set bash shell in Makefile

fixes #1302

ref(scripts): use gometalinter for linters