IC2 rework to avoid a coremod or @Optional (#3034)

* IC2 rework to avoid a coremod or @Optional

Updated IC2 dependency

Refactored IC2 itemcharging to use an IBackupElectricManager.
Allows charging any ae powered item by using an IBackupElectricManager
instead of having to implement IElectricItem and stripping it by some
sort.

Updated IAEItemPowerStorage to use Actionable for an easier handling
with power APIs supporting a simulation.

Refactored EU P2P to avoid method stripping
Use a modified internal BasicSinkSource instead of implementing
IEnergySource and IEnergySink directly on the tunnel.

Removed the superfluous EU P2P layers.

* Removed internalBattery due to being too complex

* Creative Energy Cell is not a chargeable item

src/api/java/appeng/api/implementations/items/IAEItemPowerStorage.java

@@ -27,6 +27,7 @@ package appeng.api.implementations.items;
 import net.minecraft.item.ItemStack;
 
 import appeng.api.config.AccessRestriction;
+import appeng.api.config.Actionable;
 import appeng.api.networking.energy.IAEPowerStorage;
 
 
@@ -42,27 +43,27 @@ public interface IAEItemPowerStorage
 	 *
 	 * @return amount unable to be stored
 	 */
-	double injectAEPower( ItemStack is, double amt );
+	double injectAEPower( ItemStack stack, double amount, Actionable mode );
 
 	/**
 	 * Attempt to extract power from the device, it will extract what it can and
 	 * return it.
 	 *
-	 * @param amt to be extracted power from device
+	 * @param amount to be extracted power from device
 	 *
 	 * @return what it could extract
 	 */
-	double extractAEPower( ItemStack is, double amt );
+	double extractAEPower( ItemStack stack, double amount, Actionable mode );
 
 	/**
 	 * @return the current maximum power ( this can change :P )
 	 */
-	double getAEMaxPower( ItemStack is );
+	double getAEMaxPower( ItemStack stack );
 
 	/**
 	 * @return the current AE Power Level, this may exceed getMEMaxPower()
 	 */
-	double getAECurrentPower( ItemStack is );
+	double getAECurrentPower( ItemStack stack );
 
 	/**
 	 * Control the power flow by telling what the network can do, either add? or
@@ -70,5 +71,5 @@ public interface IAEItemPowerStorage
 	 *
 	 * @return access restriction of network
 	 */
-	AccessRestriction getPowerFlow( ItemStack is );
+	AccessRestriction getPowerFlow( ItemStack stack );
 }