Introduce a concrete type for Values and replace helm.Values
This MR defines resource.Values as a a concrete type for holding a tree-like data structure and implements its operations. It is suitable for holding Helm-like values. This new type is placed in pkg/resource.
The previous helm.Values is removed (from helm/) and all references are refactored to work with the new concrete type.
Closes #428 (closed)
Edited by Hossein Pursultani