Example updated

examples/simple_example.nim

@@ -1,4 +1,4 @@
-import ../src/rocksdb, cpuinfo
+import ../rocksdb, cpuinfo
 
 const
   dbPath: cstring = "/tmp/rocksdb_simple_example"
@@ -6,8 +6,8 @@ const
 
 proc main() =
   var
-    db: ptr rocksdb_t
-    be: ptr rocksdb_backup_engine_t
+    db: rocksdb_t
+    be: rocksdb_backup_engine_t
     options = rocksdb_options_create()
   # Optimize RocksDB. This is the easiest way to
   # get RocksDB to perform well