TropicalBook fails to load with ReplayMod

[Johni0702]

Issue Description

The ReplayMod allows users to record and replay their game sessions (it does that by recording and replaying packets sent from the server).
Trying to open such a replay with Tropicraft installed, will cause an IllegalStateException while loading the TropicalBook (see below) because the client isn't actually connected to any server (i.e. Minecraft.getCurrentServerData() returns null).

Tropicraft/src/main/java/net/tropicraft/core/encyclopedia/TropicalBook.java

Lines 86 to 92 in a49bccc

	ServerData server = Minecraft.getMinecraft().getCurrentServerData();
	if (server == null) {
	throw new IllegalStateException("Cannot load encyclopedia outside of a game!");
	}
	// FIXME Encyclopedia save data breaks if the client changes the server name
	// Needs to be moved to serverside storage
	return Paths.get("encyclopedia-servers", server.serverName, fileName).toFile();

(Storing the book data server-side as suggested by the FIXME would ofc also fix this issue if that's something you were wanting to do anyway)

Steps to Reproduce

1. Install RM+Tropicraft
2. Enter SP
3. Exit SP
4. Enter replay
5. Replay doesn't open due to exception below

Tropicraft Version: Can confirm for 7.1.9, reported for any 1.12.2 version except 7.1.0
RM Version: Any version

Crash log

[17:49:18] [Client thread/ERROR] [FML]: Exception caught during firing event net.minecraftforge.event.world.WorldEvent$Load@7d014da1:
java.lang.IllegalStateException: Cannot load encyclopedia outside of a game!
	at net.tropicraft.core.encyclopedia.TropicalBook.getSaveFile(TropicalBook.java:88) ~[TropicalBook.class:?]
	at net.tropicraft.core.encyclopedia.TropicalBook.loadData(TropicalBook.java:104) ~[TropicalBook.class:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_61_TropicalBook_loadData_Load.invoke(.dynamic) ~[?:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) ~[ASMEventHandler.class:?]
	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) [EventBus.class:?]
	at net.minecraft.client.multiplayer.WorldClient.<init>(WorldClient.java:75) [bsb.class:?]
	at net.minecraft.client.network.NetHandlerPlayClient.func_147282_a(NetHandlerPlayClient.java:298) [brz.class:?]
	at net.minecraft.network.play.server.SPacketJoinGame.func_148833_a(SourceFile:76) [jh.class:?]
	at net.minecraft.network.play.server.SPacketJoinGame.func_148833_a(SourceFile:13) [jh.class:?]
	at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [hv$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_212]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212]
	at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1088) [bib.class:?]
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398) [bib.class:?]
	at net.minecraft.client.main.Main.main(SourceFile:123) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_212]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_212]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_212]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_212]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_212]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_212]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_212]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_212]
	at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196) [NewLaunch.jar:?]
	at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231) [NewLaunch.jar:?]
	at org.multimc.EntryPoint.listen(EntryPoint.java:143) [NewLaunch.jar:?]
	at org.multimc.EntryPoint.main(EntryPoint.java:34) [NewLaunch.jar:?]