update README

README.org

@@ -1,6 +1,6 @@
-* nix_virtualenvs
+* nix_environments
 
-  This is a set of various virtual environments which can be used with the *Nix* package manager.
+  This is a set of various environments which can be used with the *Nix* package manager.
 
   Copy the =shell.nix= file from the desired folder into your project and run ~nix-shell~.
   This will drop you into a virtual environment with all requirements fulfilled.
@@ -8,7 +8,9 @@
  
   If you need more Nix packages in your environent, enhance the list ~buildInputs~ in the file =shell.nix=.
 
-** node_environment
+** node
+
+   This environment does the following:
 
    1. Create a directory =.npm/bin= if not existent
    2. Add the =.npm/bin= directory to the ~$PATH~ variable
@@ -16,13 +18,17 @@
    4. If the file =global_packages.txt= is present, install the packages via npm into the =.npm= directory
    5. Run ~npm install~ if a file =package.json= is present
 
-** python_environment
+** python
+
+   This environment does the following:
 
    1. Create a new python virtualenv in the folder =.venv= if not existent
    2. Source the virtual environment
    3. Upgrade pip to the latest version
    4. If present, install the packages from the file =requirements.txt= via pip
 
-** rust_environment
+** rust
+
+   This environment does the following:
 
    1. Run ~cargo build~ if =Cargo.toml= is present