Adds better documentation around submodules

Bug #213

README.md

@@ -39,13 +39,10 @@ Oxigraph implements the following specifications:
 
 A preliminary benchmark [is provided](bench/README.md). There is also [a document describing Oxigraph technical architecture](https://github.com/oxigraph/oxigraph/wiki/Architecture).
 
-## Development
+When cloning this codebase, don't forget to clone the submodules using
+`git clone --recursive https://github.com/oxigraph/oxigraph.git` to clone the repository including submodules or
+`git submodule update --init` to add the submodules to the already cloned repository.
 
-The easiest way to set up the development environment is to use Visual Studio Code's [development containers](https://code.visualstudio.com/docs/remote/containers). Note that this requires Docker Desktop on Windows and Mac and Docker CE/EE on Linux.
-
-Open the repository with Visual Studio Code and use the Command Palette to run `Remote-Containers: Rebuild Container`. This will re-open the project inside a development container with the Rust toolchain and Python dependencies installed. For more details on how the development container is set up, see [.devcontainer/devcontainer.json](.devcontainer/devcontainer.json) and [.devcontainer/Dockerfile](.devcontainer/Dockerfile).
-
-For further development details, see the README in each of the respective sub-projects.
 
 ## Help
 

lib/README.md

@@ -52,6 +52,9 @@ Some parts of this library are available as standalone crates:
 * [`spargebra`](https://crates.io/crates/spargebra) provides a SPARQL parser.
 * [`sparesults`](https://crates.io/crates/sparesults) provides parsers and serializers for SPARQL result formats.
 
+To build the library, don't forget to clone the submodules using `git clone --recursive https://github.com/oxigraph/oxigraph.git` to clone the repository including submodules or `git submodule update --init` to add submodules to the already cloned repository.
+
+
 ## License
 
 This project is licensed under either of

python/README.md

@@ -28,7 +28,7 @@ Pyoxigraph documentation is [available on the Oxigraph website](https://oxigraph
 
 ## Build the development version
 
-To build and install the development version of pyoxigraph you need to clone this git repository
+To build and install the development version of pyoxigraph you need to clone this git repository including submodules (`git clone --recursive https://github.com/oxigraph/oxigraph.git`)
 and to run `pip install .` in the `python` directory (the one this README is in).
 
 ## Help

server/README.md

@@ -39,7 +39,7 @@ You need to have [a recent stable version of Rust and Cargo installed](https://w
 To download, build and install the latest released version run `cargo install oxigraph_server`.
 There is no need to clone the git repository.
 
-To compile the server from source, clone this git repository, clone its submodules (`git submodule init && git submodule update`) and execute `cargo build --release` in the `server` directory to compile the full server after having downloaded its dependencies.
+To compile the server from source, clone this git repository including its submodules (`git clone --recursive https://github.com/oxigraph/oxigraph.git`), and execute `cargo build --release` in the `server` directory to compile the full server after having downloaded its dependencies.
 It will create a fat binary in `target/release/oxigraph_server`.
 
 ## Usage