few fixes

README.md

@@ -1,18 +1,16 @@
 EXAMPLES AND EXERCISES FOR PACS COURSE
 --------------------------------------
-
 This repo contains source code and descriptions for the examples and exercises
-that will be explained during the PACS (Programmazione Avanzata per il Calcolo
-Scientifico - Advanced Programming for Scientific Computing) course at
-Politecnico di Milano.
+that will be explained during the APSC (Advanced Programming for Scientific Computing) course at
+Politecnico di Milano, also known as PACS (Programmazioen Avanzata per il Calcolo Scientifico)
 
 The repository contains submodules, so to check it out properly you have to type
 
 ```
 git clone --recursive https://github.com/pacs-course/pacs-examples.git
 ```
 
-or
+or (preferred choice!)
 
 ```
 git clone --recursive [email protected]:pacs-course/pacs-examples.git
@@ -33,9 +31,11 @@ or just, from this directory,
 ```
 
 
-The software requires a c++ compiler, i.e. gcc >= 8.0 or clang >= 8.
+The software requires a c++ compiler, i.e. gcc >= 8.0 or clang >= 8, and the [Eigen library](https://eigen.tuxfamily.org) for linear algebra
+version 8.
+
 You may check the version of you compiler with the option -v. Several examples have now been ported to c++17
-and some examples of c++20 are being added. Check wether your compile support those standards. You may have a look
+and some examples to c++20. Check wether your compile support those standards. You may have a look
 on https://en.cppreference.com/w/cpp/compiler_support
 
 This directory contains some utilities:
@@ -51,34 +51,26 @@ or
 . load_modules.sh
 ```
 
-will load the main modules used in the examples, a part hdf5 wich is used only on the example on iostreams (binary file).
+will load the main modules used in the examples, a part `hdf5` which is used only on the example on input-output streams.
 
-**  install_modules.sh
+## Installing git submodules ## 
 
 If you do not have used --recursive when cloning this repo and you want to use
 the git submodules containing third party software type:
 ```
-./install_modules
+./install_git_submodules.sh
 ```
 
-The file submodule_commands.txt contains some reminder of useful git commands for operating with submodules
+The file submodule_commands.txt contains some reminder of useful git commands for operating with submodules. We also have the following utilities
 
+- `change_submodules_url.sh` changes the protocol of the submodules to https. You should not need it!
 
-** change_submodules_url.sh
-Change the protocol of the submodules to https. You should not need it!
-
-** change_submodules_url_ssh.sh
-Change the protocol of the submodules to ssh. You should not need it!
+- `change_submodules_url_ssh.sh` changes the protocol of the submodules to ssh. You should not need it!
 
 ## WHAT DO DO NEXT? ##
 
 - Go to the `Extras/` directory that contains additional software used by some examples and follow the instructions in the local `README.md` file.
 - Go to the `Examples/` directory and follow the instructions in the local `README.md` file. 
 
-## What ELSE? ##
-
-  * Labs/` Directory with the laboratory sessions of the course, subdivided by year! Enjoy!
-
-