Moves some config values from StarGate and into the StarGateConfig class

Renames EconomyHandler to EconomyConfig and puts it in the new config package
Moves the LanguageLoader to the config package
Fixes the explanation of chargeFreeDestination in the README

src/main/java/net/knarcraft/stargate/config/StargateGateConfig.java

@@ -0,0 +1,169 @@
+package net.knarcraft.stargate.config;
+
+import net.knarcraft.stargate.Stargate;
+import org.bukkit.ChatColor;
+import org.bukkit.configuration.file.FileConfiguration;
+
+import static net.knarcraft.stargate.Stargate.getString;
+
+/**
+ * The Stargate gate config keeps track of all global config values related to gates
+ */
+public final class StargateGateConfig {
+
+    private int maxGatesEachNetwork = 0;
+    private boolean rememberDestination = false;
+    private boolean handleVehicles = true;
+    private boolean sortNetworkDestinations = false;
+    private boolean protectEntrance = false;
+    private boolean enableBungee = true;
+    private boolean verifyPortals = true;
+    private boolean destroyExplosion = false;
+    private ChatColor signColor;
+    private String defaultGateNetwork = "central";
+
+    /**
+     * Instantiates a new stargate config
+     *
+     * @param newConfig <p>The file configuration to read values from</p>
+     */
+    public StargateGateConfig(FileConfiguration newConfig) {
+        loadGateConfig(newConfig);
+    }
+
+    /**
+     * Gets the maximum number of gates allowed on each network
+     *
+     * @return <p>Maximum number of gates for each network</p>
+     */
+    public int maxGatesEachNetwork() {
+        return maxGatesEachNetwork;
+    }
+
+    /**
+     * Gets whether a portal's lastly used destination should be remembered
+     *
+     * @return <p>Whether a portal's lastly used destination should be remembered</p>
+     */
+    public boolean rememberDestination() {
+        return rememberDestination;
+    }
+
+    /**
+     * Gets whether vehicle teleportation should be handled in addition to player teleportation
+     *
+     * @return <p>Whether vehicle teleportation should be handled</p>
+     */
+    public boolean handleVehicles() {
+        return handleVehicles;
+    }
+
+    /**
+     * Gets whether the list of destinations within a network should be sorted
+     *
+     * @return <p>Whether network destinations should be sorted</p>
+     */
+    public boolean sortNetworkDestinations() {
+        return sortNetworkDestinations;
+    }
+
+    /**
+     * Gets whether portal entrances should be protected from block breaking
+     *
+     * @return <p>Whether portal entrances should be protected</p>
+     */
+    public boolean protectEntrance() {
+        return protectEntrance;
+    }
+
+    /**
+     * Gets whether BungeeCord support is enabled
+     *
+     * @return <p>Whether bungee support is enabled</p>
+     */
+    public boolean enableBungee() {
+        return enableBungee;
+    }
+
+    /**
+     * Gets whether all portals' integrity has to be verified on startup and reload
+     *
+     * @return <p>Whether portals need to be verified</p>
+     */
+    public boolean verifyPortals() {
+        return verifyPortals;
+    }
+
+    /**
+     * Gets whether portals should be destroyed by nearby explosions
+     *
+     * @return <p>Whether portals should be destroyed by explosions</p>
+     */
+    public boolean destroyedByExplosion() {
+        return destroyExplosion;
+    }
+
+    /**
+     * Gets the color to use for drawing signs
+     *
+     * <p>Highlighting may use other colors. This is just the base color for portal names and such.</p>
+     *
+     * @return <p>The color to use for drawing signs</p>
+     */
+    public ChatColor getSignColor() {
+        return signColor;
+    }
+
+    /**
+     * Gets the default portal network to use if no other network is given
+     *
+     * @return <p>The default portal network</p>
+     */
+    public String getDefaultPortalNetwork() {
+        return defaultGateNetwork;
+    }
+
+    /**
+     * Loads all config values related to gates
+     *
+     * @param newConfig <p>The configuration containing the values to read</p>
+     */
+    private void loadGateConfig(FileConfiguration newConfig) {
+        String defaultNetwork = newConfig.getString("gates.defaultGateNetwork");
+        defaultGateNetwork = defaultNetwork != null ? defaultNetwork.trim() : null;
+        maxGatesEachNetwork = newConfig.getInt("gates.maxGatesEachNetwork");
+
+        //Functionality
+        handleVehicles = newConfig.getBoolean("gates.functionality.handleVehicles");
+        enableBungee = newConfig.getBoolean("gates.functionality.enableBungee");
+
+        //Integrity
+        protectEntrance = newConfig.getBoolean("gates.integrity.protectEntrance");
+        verifyPortals = newConfig.getBoolean("gates.integrity.verifyPortals");
+        destroyExplosion = newConfig.getBoolean("gates.integrity.destroyedByExplosion");
+
+        //Cosmetic
+        sortNetworkDestinations = newConfig.getBoolean("gates.cosmetic.sortNetworkDestinations");
+        rememberDestination = newConfig.getBoolean("gates.cosmetic.rememberDestination");
+        loadSignColor(newConfig.getString("gates.cosmetic.signColor"));
+    }
+
+    /**
+     * Loads the correct sign color given a sign color string
+     *
+     * @param signColor <p>A string representing a sign color</p>
+     */
+    private void loadSignColor(String signColor) {
+        if (signColor != null) {
+            try {
+                this.signColor = ChatColor.valueOf(signColor.toUpperCase());
+                return;
+            } catch (IllegalArgumentException | NullPointerException ignored) {
+            }
+        }
+        Stargate.logger.warning(getString("prefix") +
+                "You have specified an invalid color in your config.yml. Defaulting to BLACK");
+        this.signColor = ChatColor.BLACK;
+    }
+
+}