Version-related API changes

[christophermaier]

• bundle deletion is version aware
• bundle enable/disable is version aware
• dry-run option for bundle delete
• bundle installation changes: update messaging at least
• API changes

POST /v1/bundles - installation (the only way)
GET /v1/bundles/:name - return list of all installed versions
GET /v1/bundles/:name/:version - details about specific version
DELETE /v1/bundles/:name/:version - delete specific version (must be disabled first)
DELETE /v1/bundles/:name - if given an explicit list of versions, delete each one. If not, delete all installed versions. Atomic.

There is no PUT.

[christophermaier]

Update:

• GET /v1/bundles - list bundles
• POST /v1/bundles - installation (the only way)
• GET /v1/bundles/:id - return information about single bundle
• GET /v1/bundles/:id/versions - return information about all known versions of a single bundle
  Though perhaps this is subsumed into GET /v1/bundles/:id?
• GET /v1/bundles/:id/versions/:bundle_version_id - details about specific version
  Perhaps this is just GET /v1/bundle_versions/:bundle_version_id instead
• DELETE /v1/bundles/:id/versions/:bundle_version_id - delete specific version (must be disabled first)
• DELETE /v1/bundles/:id - deletes all versions of the bundle, as well as the bundle itself
• GET /v1/bundles/:id/status - which bundle version, if any, is enabled?
• POST /v1/bundles/:id/versions/:bundle_version_id/status - toggle enabled/disabled status of a version