Unified build script (#175)

* Update build script
* Update build script to import fix for shadow in dev and sources artifacts
* Update fixed build script to shadow csv dependency in dev jar as well
* Moved jitpack
* Move new files

src/main/java/codechicken/nei/api/IStackStringifyHandler.java

@@ -0,0 +1,15 @@
+package codechicken.nei.api;
+
+import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.item.ItemStack;
+
+public interface IStackStringifyHandler
+{
+
+    public NBTTagCompound convertItemStackToNBT(ItemStack[] stacks);
+
+    public ItemStack convertNBTToItemStack(NBTTagCompound nbtTag);
+
+    public ItemStack normalize(ItemStack item);
+
+}