Add exercise assignment for Work distribution

Author: mlouhivu

multiprocessing/work-distribution/README.md

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+## Work distribution
+
+Read the atom coordinates of the Zika virus [5ire.pdb](5ire.pdb) using the
+simple parser provided in [pdb.py](pdb.py) (see comments in the file for
+examples on how to use it). In [center-of-coords.py](center-of-coords.py) is a
+skeleton code you may also use as a starting point.
+
+Calculate the center of coordinates in parallel by dividing the coordinates
+in smaller chunks (e.g. 100 coordinates) to separate tasks. After completing
+the tasks in worker processes, combine the results in the master process.
+
+If needed, figure out also how to deal with any coordinates left out of the
+neat uniform-sized chunks.
+
+a) Use a Pool of Workers to distribute the tasks to worker processes.
+   *Hint*: if you return also the weight of each chunk, you can process also
+   non-uniform sized chunks.
+
+OR
+
+b) Use a Queue to distribute the tasks to worker processes. Store the results
+   for each chunk in a separate queue.