Added initial version of deployments

app/controllers/projects/builds_controller.rb

app/controllers/projects/commit_controller.rb

app/controllers/projects/environments_controller.rb

app/helpers/projects_helper.rb

app/models/ability.rb

app/models/ci/build.rb

app/models/deployment.rb

app/models/environment.rb

app/models/project.rb

app/services/ci/create_builds_service.rb

app/services/create_deployment_service.rb

app/views/projects/deployments/_deployment.html.haml

app/views/projects/environments/_environment.html.haml

app/views/projects/environments/index.html.haml

app/views/projects/environments/show.html.haml

app/views/projects/pipelines/_head.html.haml

db/migrate/20160610204157_add_deployments.rb

db/migrate/20160610204158_add_environments.rb

db/migrate/20160610211845_add_environment_to_builds.rb

db/schema.rb