feat(reflect-metadata): remove import

- update README to provide some more information about what is required to start to use dynamo-easy
- adding comment with breaking change which I forgot to add previously

BREAKING CHANGE
all consumers of dynamo-easy must install and import reflect-metadata in their project.

Author: michaelwittwer

README.md

@@ -17,19 +17,23 @@ Built with :heart: by [shiftcode](https://www.shiftcode.ch).
 
 # Get Started
 
-## Metadata Reflection API
+## Prerequisite
+
+### Typescript Metadata
+
+#### Reflection API
 
 > ⚠ The reflect-metadata polyfill should be imported only once in your entire application because the Reflect object is 
 mean to be a global singleton.
 
-Required always. Use reflect-metadata as polyfill.
+Install the reflect-metadata polyfill.
 
 ```
 npm install reflect-metadata --save
 ```
 
 The type definitions for reflect-metadata are included in the npm package. 
-You need to add the following reference to the types field in your tsconfig.json:
+You need to add the following reference to the types field in your [tsconfig.json](https://www.typescriptlang.org/docs/handbook/tsconfig-json.html#types-typeroots-and-types):
 
 ```
 "types": ["reflect-metadata"]
@@ -41,8 +45,20 @@ Finally, import reflect-metadata in some entry file in your application.
 import "reflect-metadata"
 ```
 
+#### Decorators
+
+
+We need to enable the two experimental features to work with decorators, add this to your tsconfig.json:
+
+```
+"experimentalDecorators": true
+"emitDecoratorMetadata": true
+```
+
+#### Other
 Also make sure to install the other peer dependencies of @shiftcoders/dynamo-easy.
 
+
 ## First Sample
 
 When all the setup work is done, define your first model and create a dynamo store to execute actions on the dynamoDB.
@@ -85,11 +101,6 @@ dynamoStore.scan()
 # Decorators
 Decorators are used to add some metadata to our model classes, relevant to our javascript-to-dynamo mapper.
 
-This is an experimental feature and requires to set the following typescript compiler options:
- 
-- "experimentalDecorators": true
-- "emitDecoratorMetadata": true
-
 Additionally we rely on the reflect-metadata (https://www.npmjs.com/package/reflect-metadata) library for reflection api.
 
 To get started with decorators just add a [@Model()](https://shiftcode.github.io/dynamo-easy/modules/_decorator_impl_model_model_decorator_.html) Decorator to any typescript class.