Enable dependency resolution for the Maven plugin

Fixes #16

Author: luontola

Diff for: README.md

@@ -140,6 +140,11 @@ the lambda accesses an instance variable).
 Version History
 ---------------
 
+### Upcoming
+
+- Fixed the Retrolambda Maven plugin not using the project's classpath
+  ([Issue #16](https://github.com/orfjackal/retrolambda/issues/16))
+
 ### Retrolambda 1.2.0 (2014-05-02)
 
 - Maven plugin for running Retrolambda (by Dave Moten)

Diff for: retrolambda-maven-plugin/src/main/java/net/orfjackal/retrolambda/maven/ProcessMainClassesMojo.java

@@ -10,7 +10,9 @@
  * Processes main (non-test) classes compiled with Java 8 so that they will be
  * compatible with Java 5, 6 or 7 runtime.
  */
-@Mojo(name = "process-main", defaultPhase = LifecyclePhase.PROCESS_CLASSES)
+@Mojo(name = "process-main",
+        defaultPhase = LifecyclePhase.PROCESS_CLASSES,
+        requiresDependencyResolution = ResolutionScope.COMPILE)
 public class ProcessMainClassesMojo extends ProcessClassesMojo {
 
     public ProcessMainClassesMojo() {

Diff for: retrolambda-maven-plugin/src/main/java/net/orfjackal/retrolambda/maven/ProcessTestClassesMojo.java

@@ -10,7 +10,9 @@
  * Processes test classes compiled with Java 8 so that they will be compatible with
  * Java 5, 6 or 7 runtime.
  */
-@Mojo(name = "process-test", defaultPhase = LifecyclePhase.PROCESS_TEST_CLASSES)
+@Mojo(name = "process-test",
+        defaultPhase = LifecyclePhase.PROCESS_TEST_CLASSES,
+        requiresDependencyResolution = ResolutionScope.TEST)
 public class ProcessTestClassesMojo extends ProcessClassesMojo {
 
     public ProcessTestClassesMojo() {