Modify give command to support 1.7 features. Fixes BUKKIT-5286

Necessary additions include an interface to add internal value conversions
that are inappropriate for proper API design. This acts as a substitute
for properly formed, user-friendly commands in an effort to maintain
relatively vanilla behavior.

By: Wesley Wolfe <weswolf@aol.com>

paper-api/src/main/java/org/bukkit/Bukkit.java

@@ -692,4 +692,12 @@ public final class Bukkit {
     public static int getIdleTimeout() {
         return server.getIdleTimeout();
     }
+
+    /**
+     * @see Server#getUnsafe()
+     */
+    @Deprecated
+    public static UnsafeValues getUnsafe() {
+        return server.getUnsafe();
+    }
 }