Add maven/gradle documentation to manual instrumentation instructions. (#1034)

* Add maven/gradle documentation to manual instrumentation instructions.

* Run :spotlessApply on the README

* Also add dependency description about the auto annotation

README.md

@@ -257,7 +257,29 @@ only supports manual instrumentation using the `opentelemetry-api` version with
 number as the Java agent you are using. Starting with 1.0.0, the Java agent will start supporting
 multiple (1.0.0+) versions of `opentelemetry-api`.
 
-You can use the OpenTelemetry `getTracer` or the `@WithSpan` annotation to
+You'll need to add a dependency on the `opentelemetry-api` library to get started.
+
+### Maven
+
+```xml
+  <dependencies>
+    <dependency>
+      <groupId>io.opentelemetry</groupId>
+      <artifactId>opentelemetry-api</artifactId>
+      <version>0.7.0</version>
+    </dependency>
+  </dependencies>
+```
+
+### Gradle
+
+```groovy
+dependencies {
+    compile('io.opentelemetry:opentelemetry-api:0.7.0')
+}
+```
+
+Now you can use the OpenTelemetry `getTracer` or the `@WithSpan` annotation to
 manually instrument your Java application.
 
 ### Configure the OpenTelemetry getTracer
@@ -284,6 +306,28 @@ public class MyClass {
 }
 ```
 
+You'll also need to add a dependency for this annotation:
+
+### Maven
+
+```xml
+  <dependencies>
+    <dependency>
+      <groupId>io.opentelemetry</groupId>
+      <artifactId>opentelemetry-extension-auto-annotations</artifactId>
+      <version>0.7.0</version>
+    </dependency>
+  </dependencies>
+```
+
+### Gradle
+
+```groovy
+dependencies {
+    compile('io.opentelemetry:opentelemetry-extension-auto-annotations:0.7.0')
+}
+```
+
 Each time the application invokes the annotated method, it creates a span
 that denote its duration and provides any thrown exceptions.