update README

Author: Remi-Gau

README.md

@@ -35,44 +35,74 @@ We use the [MISS_HIT linter](https://florianschanda.github.io/miss_hit/style_che
 
 ## How to install
 
-### Use the matlab package manager
+### Download with git
+
+``` bash
+cd fullpath_to_directory_where_to_install
+# use git to download the code
+git clone https://github.com/cpp-lln-lab/CPP_PTB.git
+# move into the folder you have just created
+cd CPP_PTB
+# add the src folder to the matlab path and save the path
+matlab -nojvm -nosplash -r "addpath(fullfile(pwd)); savepath ();"
+```
 
-This repository can be added as a dependencies by listing it in a [mpm-requirements.txt file](.mpm-requirements.txt)
-as follows:
+Then get the latest commit:
+```bash
+# from the directory where you downloaded the code
+git pull origin master
+```
 
-    CPP_PTB -u https://github.com/cpp-lln-lab/CPP_PTB.git
+To work with a specific version, create a branch at a specific version tag number
+```bash
+# creating and checking out a branch that will be calle version1 at the version tag v0.0.1
+git checkout -b version1 v0.0.1
+```
 
-You can then use the [matlab package manager](https://github.com/mobeets/mpm), to simply download the appropriate version of those dependencies and add them to your path by running a `getDependencies` function like the one below where you just need to replace `YOUR_EXPERIMENT_NAME` by the name of your experiment.
+### Add as a submodule
 
-```matlab
-  function getDependencies(action)
-  % Will install on your computer the matlab dependencies specified in the mpm-requirements.txt
-  %  and add them to the matlab path. The path is never saved so you need to run getDependencies() when
-  %  you start matlab.
-  %
-  % getDependencies('update') will force the update and overwrite previous version of the dependencies.
-  %
-  % getDependencies() If you only already have the appropriate version but just want to add them to the matlab path.
-
-  experimentName = YOUR_EXPERIMENT_NAME;
-
-  if nargin<1
-      action = '';
-  end
-
-  switch action
-      case 'update'
-          % install dependencies
-          mpm install -i mpm-requirements.txt -f -c YOUR_EXPERIMENT_NAME
-  end
-
-  % adds them to the path
-  mpm_folder = fileparts(which('mpm'));
-  addpath(genpath(fullfile(mpm_folder, 'mpm-packages', 'mpm-collections', experimentName)));
-
-  end
+Add it as a submodule in the repo you are working on.
+
+``` bash
+cd fullpath_to_directory_where_to_install
+# use git to download the code
+git submodule add https://github.com/cpp-lln-lab/CPP_PTB.git
+# move into the folder you have just created
+cd CPP_PTB
+# add the src folder to the matlab path and save the path
+matlab -nojvm -nosplash -r "addpath(fullfile(pwd))"
+```
+
+To get the latest commit you then need to update the submodule with the information 
+on its remote repository and then merge those locally.
+```bash
+git submodule update --remote --merge
 ```
 
+Remember that updates to submodules need to be commited as well. 
+
+**TO DO**
+<!-- Submodules
+pros: in principle, downloading the experiment you have the whole package plus the benefit to stay updated and use version control of this dependency. Can probably handle a use case in which one uses different version on different projects (e.g. older and newer projects).
+cons: for pro users and not super clear how to use it at the moment. -->
+
+### Direct download
+
+Download the code. Unzip. And add to the matlab path.
+
+Pick a specific version:
+
+https://github.com/cpp-lln-lab/CPP_PTB/releases
+
+Or take the latest commit (NOT RECOMMENDED):
+
+https://github.com/cpp-lln-lab/CPP_PTB/archive/master.zip
+
+**TO DO**
+<!-- Download a specific version and c/p it in a subfun folder
+pros: the easiest solution to share the code and 'installing' it on the stimulation computer (usually not the one used to develop the code).
+cons: extreme solution useful only at the very latest stage (i.e. one minute before acquiring your data); prone to be customized/modified (is it what we want?) -->
+
 ## Setting up keyboards
 
 To select a specific keyboard to be used by the experimenter or the participant, you need to know