Add ability to use subsystems as robot class constructor arguments (#53)

core/src/main/kotlin/org/sertain/Robot.kt

@@ -5,6 +5,7 @@ package org.sertain
 import android.support.annotation.VisibleForTesting
 import edu.wpi.first.wpilibj.IterativeRobot
 import edu.wpi.first.wpilibj.command.Scheduler
+import org.sertain.command.Subsystem
 
 private typealias LifecycleDistributor = RobotLifecycle.Companion.Distributor
 
@@ -143,7 +144,7 @@ public interface RobotLifecycle {
 }
 
 /** Base robot class which must be used for [RobotLifecycle] callbacks to work. */
-public abstract class Robot : IterativeRobot(), RobotLifecycle {
+public abstract class Robot(vararg subsystems: Subsystem) : IterativeRobot(), RobotLifecycle {
     private var mode = State.DISABLED
         set(value) {
             if (value != field) {
@@ -160,6 +161,8 @@ public abstract class Robot : IterativeRobot(), RobotLifecycle {
         @Suppress("LeakingThis") // Invoked through reflection and initialized later
         RobotLifecycle.rawAddListener(this)
 
+        subsystems.forEach { RobotLifecycle.addListener(it) }
+
         val existingHandler = Thread.getDefaultUncaughtExceptionHandler()
         Thread.setDefaultUncaughtExceptionHandler { t, e ->
             println("Exception occurred on thread $t:")

core/src/main/kotlin/org/sertain/command/Subsystem.kt

@@ -2,7 +2,6 @@
 @file:JvmName("SubsystemUtils")
 package org.sertain.command
 
-import edu.wpi.first.wpilibj.smartdashboard.SendableBuilder
 import org.sertain.RobotLifecycle
 import edu.wpi.first.wpilibj.command.Subsystem as WpiLibSubsystem
 
@@ -11,10 +10,5 @@ public abstract class Subsystem : WpiLibSubsystem(), RobotLifecycle {
     /** @see edu.wpi.first.wpilibj.command.Subsystem.setDefaultCommand */
     open val defaultCommand: CommandBase? = null
 
-    override fun initSendable(builder: SendableBuilder?) {
-        super.initSendable(builder)
-        RobotLifecycle.addListener(this)
-    }
-
     override fun initDefaultCommand() = setDefaultCommand(defaultCommand?.mirror)
 }