DOC: Add Python package installation instructions

README.rst

@@ -14,3 +14,10 @@ ITKBoneEnhancement
 Various filters for enhancing cortical bones in quantitative computed tomography.
 
 ITK is an open-source, cross-platform library that provides developers with an extensive suite of software tools for image analysis. Developed through extreme programming methodologies, ITK employs leading-edge algorithms for registering and segmenting multidimensional scientific images.
+
+Installation
+------------
+
+To install the Python packages::
+
+  pip install itk-boneenhancement