Refactoring project add action to project create action
Removing 'Project' prefix on attribute entities
Adding allowBlank property on project attributes
Adding metadata option, missing getters/setters on Attribute
Project attribute entity updates
Updating Attribute entity
Adding Attribute tests, fixing schema issue
Adding additional tests for Attribute entity in project bundle
Adding abstract attribute form
Adding attribute controller, routes and literal attribute form
Correct AttributeController::createAction --> addAction, adding missing template
Updating attribute controller, attribute entity
Updating attribute form
Adding attribute manager, updating services
Tweaking route name
Adding attribute type to page title
Updating schema definition in Attribute and updating LiteralAttribute form
Adding meta generator service (might discard), and updatin attribute controller
Updating entity inheritance for project attributes, adding LiteralAttribute entity
Updating default options on attribute form