Update README.rst (#467)

* Update README.rst

fix imports in README example

* Update CHANGELOG.md

Author: Darkdragon84

CHANGELOG.md

@@ -13,7 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
--   Fixed some typos (thanks to @eltociear)
+-   Fixed some typos (thanks to @eltociear, @Darkdragon84)
 
 ### Repository
 

README.rst

@@ -85,7 +85,7 @@ linear chain and the architecture supports any single-qubit gate as well as the
 
     from projectq import MainEngine
     from projectq.backends import ResourceCounter
-    from projectq.ops import QFT
+    from projectq.ops import QFT, CNOT, Swap
     from projectq.setups import linear
 
     compiler_engines = linear.get_engine_list(num_qubits=16, one_qubit_gates='any', two_qubit_gates=(CNOT, Swap))