Add a language file and system.

src/main/java/com/graywolf336/jail/enums/LangString.java

@@ -0,0 +1,10 @@
+package com.graywolf336.jail.enums;
+
+public enum LangString {
+	/** The message sent when players are jailed without a reason. */
+	JAILED,
+	/** The message sent when players are jailed with a reason. */
+	JAILEDWITHREASON,
+	/** The message sent when players are released from jail. */
+	UNJAILED;
+}