update readme

README.md

@@ -1,18 +1,8 @@
-# Install
-Install in "development mode" so any change of the program is effective.
+Install, in "development mode", so any change in the local repo is effective:
 
-Note: For system wide (global) installation log in as root or use sudo for example.
-For local (user) installation the local path must be in the `PYTHONPATH` environment variable.
-Typically `$HOME/.local/lib/pythonX.Y/site-packages`
-
-Use either:
-
-    pip install -e .
-    pip install --user -e .
-    python -m pip install -e .
-    easy_install --prefix=$HOME/.local -e .
-    pip install --install-option="--prefix-$HOME/.local" -e .
+    python -m pip install --editable git+<url>#egg=mechanics --src=$HOME/repos --prefix=$HOME/.local --break-system-packages
 
 
-# Uninstall
-    pip uninstall mechanics
+Uninstall:
+
+    python -m pip uninstall mechanics --break-system-packages