add pip requirement to conda env and update readme

README.md

@@ -135,11 +135,11 @@ If you have conda or miniconda installed, you can create environment by
 
 and use
 
-    source activate kf_bf
+    conda activate kf_bf
 
 and
 
-    source deactivate kf_bf
+    conda deactivate kf_bf
 
 to activate and deactivate the environment.
 

environment.yml

@@ -1,6 +1,7 @@
 name: kf_bf
 dependencies:
 - python
+- pip
 - ipython
 - jupyter
 - matplotlib