Updated readme with installation instructions and usage

README.md

@@ -6,3 +6,28 @@ that is fully documented, occassionally improved and
 embeddable into Python.
 
 As you may notice, I am bad at documentation.
+
+###Installation
+
+The package has a setuptools toolchain, but is not (yet?) on pip,
+which means that installation has to be performed manually. The
+process looks like this:
+
+```sh
+git clone https://github.com/hellerve/IMProved
+cd IMProved
+python setup.py install
+```
+
+And you're good to go!
+
+###Usage
+
+Easy!
+
+````python
+import improved
+
+improved.callIMP("n := 5")
+# this will return a dictionary containing the key/value pair n/5
+```