missing Copy implementations added

src/ffi.rs

@@ -33,6 +33,15 @@ pub struct RocksDBCache(pub *const c_void);
 #[repr(C)]
 pub struct RocksDBFilterPolicy(pub *const c_void);
 
+impl Copy for RocksDBOptions {}
+impl Copy for RocksDBInstance {}
+impl Copy for RocksDBWriteOptions {}
+impl Copy for RocksDBReadOptions {}
+impl Copy for RocksDBMergeOperator {}
+impl Copy for RocksDBBlockBasedTableOptions {}
+impl Copy for RocksDBCache {}
+impl Copy for RocksDBFilterPolicy {}
+
 pub fn new_bloom_filter(bits: c_int) -> RocksDBFilterPolicy {
     unsafe {
         rocksdb_filterpolicy_create_bloom(bits)

src/rocksdb.rs

@@ -31,6 +31,8 @@ pub struct RocksDBOptions {
     block_options: rocksdb_ffi::RocksDBBlockBasedTableOptions,
 }
 
+impl Copy for RocksDBOptions {}
+
 impl RocksDBOptions {
     pub fn new() -> RocksDBOptions {
         unsafe {