update documentation

Readme.rst

@@ -7,8 +7,9 @@ This is intended as a user-friendly (and easy to customize) alternative to the p
 Installation
 ============
 
-Run :bash:`./install.sh`. This will download and compile the required R-packages and install
-pandas and xlwt for python 3.
+Run :bash:`./install.sh`. This will download and compile the required R-packages
+and install `pandas <http://pandas.pydata.org/>`_ and `xlwt
+<https://pypi.python.org/pypi/xlwt>`_ for python3 (via pip).
 
 You have to clone or download the git repo first:
 
@@ -54,10 +55,9 @@ Hints
 =====
 
 The R code contained in the `noweb <https://en.wikipedia.org/wiki/Noweb>`_ file
-``statistics.Rnw`` will be extracted upon execution to ``statistics.R``. The latter
+``statistics.Rnw`` will be extracted during execution to ``statistics.R``. The latter
 file is not executed by the script, thus changing it has no effect on the grades in
-``edoz-final.txt`` nor the pdf.
-
+``edoz-final.txt`` or the pdf.
 
 Customization of the plots should be straight forward (e.g. some simple
 R/ggplot2 commands). Have a look at the following packages and the file