First attempt at building a server pack

Upgraded Forge to 10.13.4.1558; added the Forge Installer to set up the
basic server directory; added templates for certain server config files;
set up makefile rules for building the server pack

scripts/eula.txt.template

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+#By changing the setting below to TRUE you are indicating your agreement to our EULA (https://account.mojang.com/documents/minecraft_eula).
+#Tue Nov 17 17:47:41 MST 2015
+eula=true

scripts/launch.bat.template

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+java -Xmx2G -XX:MaxPermSize=256m -jar @FORGEJAR@

scripts/launch.sh.template

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+#!/bin/sh
+MEMSZ=2G
+PERMSZ=256m
+FORGEJAR=@FORGEJAR@
+
+exec java -Xmx$MEMSZ -XX:MaxPermSize=$PERMSZ -jar $FORGEJAR

scripts/server.properties.template

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+#Minecraft server properties
+#Tue Nov 17 17:51:25 MST 2015
+generator-settings=
+op-permission-level=4
+allow-nether=true
+level-name=world
+enable-query=false
+allow-flight=false
+announce-player-achievements=true
+server-port=25565
+level-type=DEFAULT
+enable-rcon=false
+level-seed=
+force-gamemode=false
+server-ip=
+max-build-height=256
+spawn-npcs=true
+white-list=false
+spawn-animals=true
+hardcore=false
+snooper-enabled=true
+online-mode=true
+resource-pack=
+pvp=true
+difficulty=1
+enable-command-block=false
+gamemode=0
+player-idle-timeout=0
+max-players=20
+spawn-monsters=true
+generate-structures=true
+view-distance=10
+motd=Erbosoft Vista @VERSION@ Server