Enhancements, see details

- Added a message to explain to the user that it needs to build and push
  images
- The Release Name string is now a constant ins source code, later we will be able to
  change it to (for example) a template call
- SHA256 injected label (from docker-compose file content) is a bit long, SHA1 is shorter
- We now add compose command line and generation date in the Values file
- Code cleanup, refactorisation and enhancements
- More documentation in the source code

compose/types.go

@@ -25,4 +25,5 @@ type Service struct {
 	Volumes     []string          `yaml:"volumes"`
 	Expose      []int             `yaml:"expose"`
 	EnvFiles    []string          `yaml:"env_file"`
+	RawBuild    interface{}       `yaml:"build"`
 }