Add a truncated version of ModList

Reasoning: mods often check if a certain mod is loaded, but most other behavior provided by this class for mods to use is either for things like getting ASM scanned annotations or otherwise out of the scope of Patchwork for the time being.

Author: TheGlitch76

patchwork-fml/src/main/java/net/minecraftforge/fml/ModList.java

@@ -0,0 +1,25 @@
+package net.minecraftforge.fml;
+
+import java.util.List;
+
+public class ModList {
+	private static ModList INSTANCE;
+	private List<String> mods;
+	//Patchwork: signature changed to just have a list of modids
+	private ModList(List<String> mods) {
+		this.mods = mods;
+	}
+	public static ModList get() {
+		return INSTANCE;
+	}
+	//Patchwork: method does not exist in Forge
+	public static ModList create(List<String> mods) {
+		INSTANCE = new ModList(mods);
+		return INSTANCE;
+	}
+	
+	public boolean isLoaded(String modId) {
+		return this.mods.contains(modId);
+	}
+
+}