[Refactoring] Improve sample images load

Conflicts:

	db/seeds.rb
	lib/populator/featured_contents.rb
	lib/populator/people.rb
	lib/populator/projects.rb
[Spec Coverage] Add spec for ErrorsDecorators
[Spec Coverage] Project model

  - Refactoring project model
[Spec Coverage] Project model

  - Refactoring project model
[Refactoring] Remove global config loader.