0.7.0-beta.3

• Moved src/Errors.js to src/Errors/index.js
• Added MissingPackageError - This formalizes a pattern to alert of a missing package, and auto-detects whether the project is using yarn or npm and adjusts it’s recommended command accordingly
• Switched SessionMiddlewareBuilder flash to use express-flash
• Added req.flashInput() / res.flashInput()
• Added Router.load() to load routes from a file or directory
• Custom error handlers can now send a response directly
• Updated ErrorHandler to support custom handlers throwing errors
• Stripped trailing slash in resource routes from index/create
• Added MethodOverrideMiddlewareBuilder