Fixes crashes caused by reflection loading.

src/main/java/org/spongepowered/asm/mixin/transformer/MixinProcessor.java

@@ -70,7 +70,7 @@
 /**
  * Heart of the Mixin pipeline 
  */
-class MixinProcessor {
+public class MixinProcessor {
 
     /**
      * Phase during which an error occurred, delegates to functionality in
@@ -505,7 +505,15 @@ private void selectConfigs(MixinEnvironment environment) {
 
         Collections.sort(this.pendingConfigs);
     }
-
+
+    /**
+     * Literally only here to prevent a crash because some mods use reflection to access this method.
+     */
+    @Deprecated
+    private int prepareConfigs(MixinEnvironment environment) {
+        this.prepareConfigs(environment, this.extensions);
+    }
+
     /**
      * Prepare mixin configs
      * 

src/main/java/org/spongepowered/asm/mixin/transformer/MixinTransformer.java

@@ -42,7 +42,7 @@
 /**
  * Transformer which manages the mixin configuration and application process
  */
-final class MixinTransformer extends TreeTransformer implements IMixinTransformer {
+public final class MixinTransformer extends TreeTransformer implements IMixinTransformer {
 
     /**
      * Impl of mixin transformer factory