Update build/install instruction in the readme

README.md

@@ -47,13 +47,11 @@ Some additional documentation can be found in `cydoomgeneric/cydoomgeneric.pyx`.
 
 ## Building
 
-The following python packages are required: `numpy cython`.
-
 To build and install cydoomgeneric, run the following commands:
 
 ```
 $ cd cydoomgeneric
-$ python setup.py install
+$ pip install .
 ```
 
 ## Demo Screenshots