Add some precisions in system package install guide.

gen_doc/bin_pkgs/README_template.md

@@ -13,7 +13,7 @@
 
 ### 1.1 For Python
 
-@note  This section treats only of system packages/installers but note that some pip packages are also available and this is in fact the recommended way of installing pyfaust, in particular because of the easier weak dependency management. You might install them in virtual environments:
+@note  This section treats only of system packages/installers but note that some PIP and Anaconda packages are also available. They are recommended way of installing pyfaust, in particular because of the easier weak dependency management. You might install them in virtual environments:
 \ref install_pyfaust_in_venv.<br/> 
 
 FAµST is designed for the Python ecosystem which as usual relies on the numpy and scipy packages.
@@ -25,7 +25,7 @@ Please ensure these packages are installed on your system. One way to install th
 	pip install numpy scipy matplotlib # pygsp
 	# it could be pip3 instead of pip
 
-Note that you probably have to install those packages for all versions of Python you want to use (each one have normally its associated pip executable).<br/>
+Note that you probably have to install those packages for all versions of Python you want to use (each one has normally its associated pip executable).<br/>
 Note also that you can rely on your system package manager to install the Python packages (e.g. dnf/yum repositories on Fedora/Centos Linux systems).
 
 FAµST is compiled for Python @PY3_VER@.
@@ -105,9 +105,9 @@ OK! You can follow the [quick start usage](#usage) now.
 
 To test whether the FaµST Python wrapper has been setup properly, simply open a terminal and type:
 
-	python2 -c "import pyfaust; print('It works.')"
+	python3 -c "import pyfaust; print('It works.')"
 
-	# it could be python3, python@PY3_VER@ or just python,
+	# it could be python@PY3_VER@ or just python,
 	# depending on your configuration and the python version you want to use
 
 It goes without saying that if the wrapper is set up properly you'll see the message "It works." as a result of the command above.
@@ -122,15 +122,15 @@ indicates that you need to add the Python wrapper manually in your Python path a
 
 - For Linux and macOS in a Bash terminal:
 
-	$ export PYTHONPATH=$PYTHONPATH:@FAUST_INSTALL_PATH@/python
+	$ export PYTHONPATH=$PYTHONPATH:@FAUST_INSTALL_PATH@/python3
 	# and test again
-	$ python2 -c "import pyfaust; print('It works.')"
+	$ python3 -c "import pyfaust; print('It works.')"
 
 - For Windows in the command prompt:
 
-	set PYTHONPATH=%PYTHONPATH%;@FAUST_INSTALL_PATH@/python
+	set PYTHONPATH=%PYTHONPATH%;@FAUST_INSTALL_PATH@/python"
 	:: and test again
-	python -c "import pyfaust; print('It works.')"
+	python3 -c "import pyfaust; print('It works.')"
 
 If it fails again you are likely on a different version of Python or the auto-setup script failed for any reason during installation. Return to the [Prerequisites](#prerequisites) section and check your Python environment matches FAµST requirements.
 Otherwise it works but you'll need to set the `export' command manually in one of your startup scripts to have it set for once and for all (e.g. in ~/.bashrc if you are a Bash user).

gen_doc/bin_pkgs/win/README_install_part.html

@@ -12,7 +12,14 @@ Alternatively, you can also proceed with the following command in a cmd.exe prom
 :: with administrator being the name of an account with Administrator rights
 </code></pre>
 
-<b>WARNING:</b> For the installation process to succeed you should have Matlab or Python (relevant version) set in your PATH environment variable (you can update it in Windows parameters). Of course if you want to use only the Python wrapper you don't need to worry about setting the PATH environment for Matlab and conversely. But note that if later you change your mind and want FAµST for the both languages you'll just need to relaunch the installer.
+<b>WARNING:</b> For the installation process to succeed you should have Matlab
+and Python (relevant version) set in your PATH environment variable (you can
+update it in Windows parameters). Of course if you want to use only the Python
+wrapper you don't need to worry about setting the PATH environment for Matlab
+and conversely. However the installer tries to install pyfaust and matfaust in
+all cases so if you have not installed python or matlab don't be afraid to see
+error messages (it is recommended to install Python in any case though).
+Note that if later you change your mind and want FAµST for the both languages you'll just need to relaunch the installer.
 <br/><br/>
 After installing the package, you'll need to restart your Matlab or Python session in order to take into account the new configuration of your environment.