Add a link to the Numpy cheatsheet to MI-PYT

#318
Fixes: #243

Author: encukou

courses/mi-pyt/info.yml

@@ -45,6 +45,9 @@ plan:
   materials:
   - lesson: intro/notebook
   - lesson: intro/numpy
+  - title: Tahák na NumPy
+    url: https://github.com/pyvec/cheatsheets/raw/master/numpy/numpy-cs.pdf
+    type: cheatsheet
 
 - title: Analýza dat – Pandas
   slug: pandas

runs/2017/mipyt-zima/info.yml

@@ -51,6 +51,9 @@ plan:
   date: 2017-11-01
   materials:
   - lesson: intro/numpy
+  - title: Tahák na NumPy
+    url: https://github.com/pyvec/cheatsheets/raw/master/numpy/numpy-cs.pdf
+    type: cheatsheet
   - title: Zadání úkolu
     url: https://github.com/cvut/MI-PYT/blob/master/tutorials/05_numpy.md#%C3%9Akol
     type: homework