ref(chartutil): move chart loading out of chartutil into new package
    add chart loader interface to allow lazy loading
feat(chart): create chart accessors
ref(*): cleanup requirements
ref(tiller): remove optional template engines
ref(tiller): simplify sorting releases and hooks
ref(*): code simplification
ref(hapi): move chart package out of hapi
ref(chart): add requirements and lock to Chart struct

To match the convention of `helm install`, `helm uninstall` is the inverse.

Other tangential changes in this PR:

- StatusDeleting has been changed to StatusUninstalling
- StatusDeleted has been changed to StatusUninstalled
- `helm list --deleted` has been changed to `helm list --uninstalled`
- `helm list --deleting` has been changed to `helm list --uninstalling`
- `helm.DeleteOption` and all delete options have been renamed to `helm.UninstallOption`

I have not made any changes to the "helm.sh/hook-delete-policy", "pre-delete" and "post-delete" hook annotations because

1. it's a major breaking change to existing helm charts, which we've commited to NOT break in Helm 3
2. there is no "helm.sh/hook-install-policy" to pair with "helm.sh/hook-uninstall-policy", so delete still makes sense here

`helm delete` and `helm del` have been added as aliases to `helm uninstall`, so `helm delete` and `helm del` still works as is.

`go test ./pkg/tiller -test.log`

TODO reimplement any paging

Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

Cover hook-succeeded, hook-failed and before-hook-creation hook delete policies.

Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

* give an uniform check for release process

* fixed as the review of adamreese: update the err message when releasename is empty and update the test units.

* fixed as the review of bacongobbler: add more detail information to return message. the regex rule is added to the return message.

resolves #2290

TestInstallRelease_WithChartAndDependencyNotes  -> tiller/release_install_test.go
TestInstallRelease_WrongTillerVersion -> tiller/release_install_test.go
TestInstallRelease_WithNotesRendered -> tiller/release_install_test.go
TestInstallRelease_TillerVersion -> tiller/release_install_test.go
TestInstallRelease_FailedHooks -> tiller/release_install_test.go
TestInstallRelease_ReuseName -> tiller/release_install_test.go
TestInstallRelease_WithNotes -> tiller/release_install_test.go
TestInstallRelease_NoHooks -> tiller/release_install_test.go
TestInstallRelease_DryRun -> tiller/release_install_test.go
TestInstallRelease -> tiller/release_install_test.go

TestListReleasesByStatus -> tiller/release_list_test.go
TestListReleasesFilter -> tiller/release_list_test.go
TestListReleasesSort -> tiller/release_list_test.go
TestListReleases -> tiller/release_list_test.go
TestUpdateRelease_ResetReuseValues -> tiller/release_update_test.go
TestUpdateRelease_ResetValues -> tiller/release_update_test.go
TestUpdateRelease_ReuseValues -> tiller/release_update_test.go
TestUpdateReleaseNoChanges -> tiller/release_update_test.go
TestUpdateReleaseFailure -> tiller/release_update_test.go
TestUpdateReleaseNoHooks -> tiller/release_update_test.go
TestUpdateRelease -> tiller/release_update_test.go
TestRollbackReleaesFailure -> tiller/release_rollback_test.go

TestRunReleaseTest -> tiller/release_testing_test.go
TestGetReleaseContent -> tiller/release_content_test.go
TestGetReleaseStatusDeleted -> tiller/release_status_test.go
TestGetReleaseStatus -> tiller/release_status_test.go
TestRollbackReleaseFailure -> tiller/release_rollback_test.go
TestRollbackReleaseNoHooks -> tiller/release_rollback_test.go
TestRollbackRelease -> tiller/release_rollback_test.go
TestUninstallReleaseWithKeepPolicy -> tiller/release_uninstall_test.go
TestUninstallPurgeDeleteRelease -> tiller/release_uninstall_test.go
TestUninstallReleaseNoHooks -> tiller/release_uninstall_test.go
TestUninstallPurgeRelease -> tiller/release_uninstall_test.go
TestUninstallRelease -> tiller/release_uninstall_test.go

Adds a generic logging interface to importable packages.

Extracted delete specific code from ReleaseServer to external function
which is called from both Local and Remote ReleaseModules.

Made getVersionSet function from tiller package exported.

This change introduces the concept of Rudders - pluggable modules that
Tiller communicates with via grpc, which allow to decouple orchestration
logic from Tiller into separate service.

This commit consists of simple Rudder implementation which does exactly
the same thing as built in Tiller orchestrator - it creates all k8s
objects from provided manifest without orchestrating them.

--experimental-release flag is introduced to enable this behaviour.

This change allows to use the service and tiller outside of the cluster.
Following commits will add Rudder to helm deployment.

Adds an `unreleased` flag to the version if not building from HEAD of a
tag. The compatibility check is bypassed if the client or server are
unreleased.

fixes #2110

This provides the Chart.yaml field `tillerVersion`, which is a semver
range. It allows users to choose to constrain a chart to a specific
version.

The reason for this is that we keep introducing new template functions,
but we have no way of saying "this chart will only work with Tiller
newer than...".

The check on version is _only_ done on Tiller. The client does not check
at all, since it does not do any template expansion on its own.

This makes it possible to re-use the existing values on an upgrade,
merging in any new values set by `-f` or `--set`.

Closes #1876

Users can now specify a namespace filter for 'helm list'.  Only the
releases within the specified namespace will be shown.  For example,
'helm list --namespace foo' will only show releases for the 'foo'
namespace.  Also added a namespace field to the table view.

Closes #1563

* also cleanup comments