Topcoffea analysis tutorial is missing explanation how to install topcoffea for futures/dask executor

[oshadura]

@zorache @mat-adamec I tried to clone coffea-casa-tutorials in coffea-casa and run it:

---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-1-3b5974179c2f> in <module>
     11 import sys
     12 sys.path.append('..')
---> 13 from topcoffea.modules import samples
     14 from topcoffea.modules.fileReader import GetFiles, GetAllInfoFromFile
     15 

ModuleNotFoundError: No module named 'topcoffea.modules'

[mat-adamec]

The tutorial for this should probably be in the coffea-casa docs, right?

I can add the steps once all the quirks of worker-installation are resolved.