Update readme

README.md

@@ -1,22 +1,13 @@
-Deb builder for extpython
+extpython
+=========
 
-Build process:
+Isolated python installations for Ubuntu
 
-- ./build.sh to kick off the process, runs a docker image - docker run -it --rm -v $PWD:/src ubuntu:bionic bash
-    - ./build-inner.sh called in the container, prepares the environment
-    - ./build-inner.sh switches to an underpriv'd user and calls...
-        - ./build-deb.sh - does the actual build
+Extpython is a collection of tools for building installable packages containing various versions of Python. The
+installations are isolated from the operating system's python such that modules may be added, removed, or upgraded
+without risk of breaking. The builds are executed in Docker.
 
 TODO:
-- parameterize the build:
-    - vars.sh needs to pass PYTHON_RELEASE down into the makefile
-    - debian metadata files need to obey this too:
-        - changelog: package name and version
-        - control: package name
-        - Makefile: a component of the --prefix path
 
-TODO later:
-- upload resulting deb to artifact
-- support other than Bionic
-- separate process into creating the builder image & building the deb itself
-- parameter for pre-loaded pip modules
+- Support other than Bionic
+- Parameter for pre-loaded pip modules