Improve README: Add maven dependency and elaborate on introduction

Author: nymanjens

README.md

@@ -3,9 +3,18 @@ TestParameterInjector
 
 ## Introduction
 
+`TestParameterInjector` is a JUnit4 test runner that runs its test methods for
+different combinations of field/parameter values.
+
 Parameterized tests are a great way to avoid code duplication between tests and
 promote high test coverage for data-driven tests.
 
+There are a lot of alternative parameterized test frameworks, such as
+[junit.runners.Parameterized](https://github.com/junit-team/junit4/wiki/parameterized-tests)
+and [JUnitParams](https://github.com/Pragmatists/JUnitParams). We believe
+`TestParameterInjector` is an improvement of those because it is more powerful
+and simpler to use.
+
 ## Getting started
 
 To start using `TestParameterInjector` right away, copy the following snippet:
@@ -31,6 +40,21 @@ public class MyTest {
 }
 ```
 
+And add the following dependency to your `.pom` file:
+
+```xml
+<dependency>
+  <groupId>com.google.testparameterinjector</groupId>
+  <artifactId>test-parameter-injector</artifactId>
+  <version>1.0-rc1</version>
+</dependency>
+```
+
+or see [this maven.org
+page](https://search.maven.org/artifact/com.google.testparameterinjector/test-parameter-injector)
+for instructions for other build tools.
+
+
 ## Basics
 
 ### `@TestParameter` for testing all combinations