Update readme.md

Author: dean0x7d

readme.md

@@ -1,14 +1,16 @@
-Embedded python distribution
-----------------------------
+Embedded Python as a Conan package
+----------------------------------
 
 [![](https://github.com/lumicks/embedded_python/workflows/test_package/badge.svg)](https://github.com/lumicks/embedded_python/actions)
 
-This conan recipe builds an embedded Python distribution which can be placed directly into the `bin` directory of an application for its exclusive use.
-Windows-only for now.
+This Conan recipe builds an embedded Python distribution that is intended to be used as part of an application (e.g. placed into the `bin` directory).
+The application can then execute Python code internally.
 
-The base recipe uses the stock embeddable Python version from the python.org website.
-The Python version is specified using the mandatory `embedded_python:version=x.y.z` option.
-If the `embedded_python:packages=...` option is passed, the recipe will `pip install` additional packages. 
-The contents of that option is hashed by Conan, so `embedded_python:packages="numpy=1.15 scipy=1.2"` is clearly different from `embedded_python:packages="numpy=1.16 scipy=1.3"`.
-That way, the full Python environment is controlled via Conan.
-The initial build of a new Python environment can take some time but after that it's caches as a binary package.
+## Motivation
+
+Python.org provides an [embeddable package](https://docs.python.org/3/using/windows.html#the-embeddable-package) as a minimal distribution that is intended exactly for this purpose.
+The documentation suggests that it is possible to install third-party packages within this distribution and embed everything into an application, but it's quite short on details.
+By design, `pip` is not available in the embedded Python in order to ensure that the environment is frozen after deployment.
+However, this does make it difficult to get third-party packages into the environment in the first place.
+
+The aim of this Conan recipe is to make it easy to build an embedded Python distribution with any third-third party packages available on pypi.org.