docs/developers.md already has these instructions. And 80% of the time
someone looking at this project is interested in getting started not
hacking directly.

README: move history to docs/history.md

ref(helm): simplify tunnel tests

fix(tiller): re-enable skipped test, golint, & gofmt all the things

feat(rollback storage): support for rolling back to previous release.

feat(helm): add optional version flag to helm{get,status}

The history is helpful for people who have never heard of helm but I
don't think it is super relevant for most users.

fix(helm): avoid a panic for sign

Before this fix:

```
 /Users/philips/src/k8s.io/helm/bin/helm package --sign mychart --key FC8A365E
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0x13120a]

goroutine 1 [running]:
panic(0x10fed00, 0xc4200120d0)
       	/usr/local/Cellar/go/1.7.1/libexec/src/runtime/panic.go:500 +0x1a1
k8s.io/helm/pkg/provenance.(*Signatory).ClearSign(0xc4205db100, 0xc42011ec20, 0x20, 0x8, 0xc4205db100, 0x0, 0x0)
       	/Users/philips/src/k8s.io/helm/pkg/provenance/sign.go:156 +0x3a
main.(*packageCmd).clearsign(0xc420017720, 0xc42011ec20, 0x20, 0x0, 0x0)
       	/Users/philips/src/k8s.io/helm/cmd/helm/package.go:143 +0xa5
main.(*packageCmd).run(0xc420017720, 0xc420390240, 0xc420120d00, 0x1, 0x4, 0x13639b0, 0x104dfe0)
       	/Users/philips/src/k8s.io/helm/cmd/helm/package.go:130 +0x31b
main.newPackageCmd.func1(0xc420390240, 0xc420120d00, 0x1, 0x4, 0x0, 0x0)
       	/Users/philips/src/k8s.io/helm/cmd/helm/package.go:77 +0xc4
k8s.io/helm/vendor/github.com/spf13/cobra.(*Command).execute(0xc420390240, 0xc420120c40, 0x4, 0x4, 0xc420390240, 0xc420120c40)
       	/Users/philips/src/k8s.io/helm/vendor/github.com/spf13/cobra/command.go:571 +0x234
k8s.io/helm/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0xc420405200, 0x0, 0x0, 0x0)
       	/Users/philips/src/k8s.io/helm/vendor/github.com/spf13/cobra/command.go:661 +0x367
k8s.io/helm/vendor/github.com/spf13/cobra.(*Command).Execute(0xc420405200, 0x1b52720, 0xc4200001a0)
       	/Users/philips/src/k8s.io/helm/vendor/github.com/spf13/cobra/command.go:620 +0x2b
main.main()
       	/Users/philips/src/k8s.io/helm/cmd/helm/helm.go:110 +0x2d
```

fix(Makefile): cleanup _dist files

fix(lint): allow .txt files

closes #1161

feat(charts): add 'dependencies:' to Chart.yaml

fix(tiller): store failed release on post-inst failure

feat(release): remove tiller from cross compile

fix(kube): delete should skip resources not found

This feature adds a dependencies section to a chart file. It is a
prerequisite for adding automated chart management tooling as described
in #874.

fix(helm): removed debug output

This fixes a bug where post-install hooks did not result in recording a
failure.

Also fixed a bug where a `--dry-run` will result in an error because
of the recently added status support.

There are several other output inconsistencies that I noticed and filed
as issue #1135.

Closes #1130

fix(tiller): Install --replace will result in an upgrade

If a release has been deleted, `install --replace` will work but the release
status will still be "deleted". This means that subsequest attempts to
change the release will fail. Upgrading the release instead will prevent
such zombie releases.

Closes #1131

feat(rollback-support): add version field to protos