Add NBT constants

As requested by @reoseah, closes DimensionalDevelopment#59

src/main/java/org/dimdev/utils/NBTConstants.java

@@ -0,0 +1,46 @@
+package org.dimdev.utils;
+
+import net.minecraft.nbt.NBTTagByte;
+import net.minecraft.nbt.NBTTagByteArray;
+import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.nbt.NBTTagDouble;
+import net.minecraft.nbt.NBTTagEnd;
+import net.minecraft.nbt.NBTTagFloat;
+import net.minecraft.nbt.NBTTagInt;
+import net.minecraft.nbt.NBTTagIntArray;
+import net.minecraft.nbt.NBTTagList;
+import net.minecraft.nbt.NBTTagLong;
+import net.minecraft.nbt.NBTTagLongArray;
+import net.minecraft.nbt.NBTTagShort;
+import net.minecraft.nbt.NBTTagString;
+
+public class NBTConstants {
+	/** The ID for {@link NBTTagEnd} */
+	public static final int END = 0;
+	/** The ID for {@link NBTTagByte} */
+	public static final int BYTE = 1;
+	/** The ID for {@link NBTTagShort} */
+	public static final int SHORT = 2;
+	/** The ID for {@link NBTTagInt} */
+	public static final int INT = 3;
+	/** The ID for {@link NBTTagLong} */
+	public static final int LONG = 4;
+	/** The ID for {@link NBTTagFloat} */
+	public static final int FLOAT = 5;
+	/** The ID for {@link NBTTagDouble} */
+	public static final int DOUBLE = 6;
+	/** The ID for {@link NBTTagByteArray} */
+	public static final int BYTE_ARRAY = 7;
+	/** The ID for {@link NBTTagString} */
+	public static final int STRING = 8;
+	/** The ID for {@link NBTTagList} */
+	public static final int LIST = 9;
+	/** The ID for {@link NBTTagCompound} */
+	public static final int COMPOUND = 10;
+	/** The ID for {@link NBTTagIntArray} */
+	public static final int INT_ARRAY = 11;
+	/** The ID for {@link NBTTagLongArray} */
+	public static final int LONG_ARRAY = 12;
+	/** Wildcard ID for any of {@link NBTTagByte}, {@link NBTTagShort}, {@link NBTTagInt}, {@link NBTTagLong}, {@link NBTTagFloat} or {@link NBTTagDouble} */
+	public static final int ANY_NUMERIC = 99;
+}