This is to future-proof charts, and also be consistent with repo and
index YAML files.

Closes #1264

Some fields were introduced to Chart metadata after Alpha.4, but are not
going to be used ever. So we made the decision to remove them before we
get stuck with ugliness.

This should not break compatibility, since these fields were not used.

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

Closes #1034

Fixed tests

Adding chart name linter

Add lint error

Moving to blocks

Moving to method

Moved lint rules to functions

Semantic version validation

Linting engine

Adding sources and home validations

Sharing file loading

Sharing file loading

Rolling back readme

Rewriting other linters

Fixing tests

Typo

Using chart.Metadata

Fixing format

Adding UNKNOWN in Engine

Adding tabs

Fixing tabs

This supports the `-f` flag for overriding values with a specified
TOML file.

Also noticed a field was omitted from metadata.proto and the docs.
Added it back, though functionally it is a no-op.

This fixes indentation, documentation, and removes unused protobuf
files.

  1. install command loads chart archive.
  2. invokes helm api to transform the pkg/chart.Chart type
     to it's proto model.
  3. the client then establishes a connection to tiller.
  4. sends InstallReleaseRequest, receives InstallReleaseResponse.

todo (for complete install):
  - walk pkg/chart.{Values,Deps,Templates} types and populate proto
    definitions for various apis/messages.

	1. remove preliminary hapi protocol buffer definitions
	2. modify hapi Makefile
	3. update hapi protobuf model in _proto/hapi/{chart,release,services}
	4. generate protobuf src to pkg/proto/hapi/{chart,release,services}