Update CONTRIBUTING.md
Merge pull request #1494 from leandrowd/contributing

Update CONTRIBUTING.md
Modify service blueprint with more explicit initializer and injection

Fix service blueprint container reference error

Add CHANGELOG entry for #1493
Merge pull request #1493 from jgwhite/service-blueprint-suffix

Modify service blueprint with more explicit initializer and injection
Add Blueprint#beforeInstall

Also use `--type=foo` instead of `type:foo` in route and resource
blueprints.