Add documentation for spring object factory cucumber#1405

Add documentation for spring object factory

Author: mlvandijk

junit/README.md

@@ -3,7 +3,7 @@ Cucumber JUnit
 
 Use JUnit to execute cucumber scenarios.
 
-Add the `cucumber-junit` dependency to your pom.
+Add the `cucumber-junit` dependency to your pom.xml:
 
 ```xml
 <dependencies>

spring/README.md

@@ -0,0 +1,93 @@
+Cucumber Spring
+===============
+
+Use Cucumber Spring to manage state between steps and for scenarios.
+
+Add the `cucumber-spring` dependency to your pom.xml:
+
+```xml
+<dependencies>
+  [...]
+    <dependency>
+        <groupId>io.cucumber</groupId>
+        <artifactId>cucumber-spring</artifactId>
+        <version>${cucumber.version}</version>
+        <scope>test</scope>
+    </dependency>
+  [...]
+</dependencies>
+```
+
+## Annotation Based Configuration
+
+For your own classes:
+
+* Add the `@Component` annotation to each of the classes cucumber-spring should manage.
+
+* Add a `@Scope("cucumber-glue")` annotation to have cucumber-spring remove them **after each scenario**
+
+* Add the location of your classes to the `@ComponentScan` of your (test) configuration:
+
+```java
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan("your.package")
+public class Config {
+    // the rest of your configuration
+}
+```
+
+For classes from other frameworks:
+
+* You will have to explicitly register them as Beans in your (test) configuration:
+
+```java
+import other.framework.Class;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Scope;
+
+@Configuration
+@ComponentScan("your.package")
+public class Config {
+    @Bean
+    @Scope("cucumber-glue")
+    public Class otherClass() {
+        // return an instance of the other class
+    }
+}
+```
+
+Now you can use the registered Beans by Autowiring them where you need them.
+
+For example:
+```java
+import your.package.OtherStepDefs;
+import org.springframework.beans.factory.annotation.Autowired;
+
+public class StepDefs {
+    @Autowired
+    OtherStepDefs otherStepDefs;
+
+    // the rest of your step definitions
+}
+
+```
+
+## XML Configuration
+
+If you are using xml based configuration, you can to register the beans in a `cucumber.xml` file:
+
+```xml
+<bean class="your.package.YourClass" scope="cucumber-glue" />
+<bean class="other.framework.Class" scope="cucumber-glue" />
+```
+
+Annotate your StepDefinition class with `@ContextConfiguration("classpath:cucumber.xml")`
+
+## SpringBoot
+
+If you are using SpringBoot, you can annotate your StepDefinition class with `@SpringBootTest(classes = TestConfig.class)`.