adding basic usage and installation information

Author: mriehl

README.md

@@ -1,2 +1,24 @@
 PythonVerbalExpressions
 =======================
+
+## Installation
+```bash
+python setup.py install
+```
+
+Hopefully you will also be able to use
+```bash
+pip install verbalexpressions
+```
+in the near future.
+
+## Usage
+```python
+from verbalexpressions import VerEx
+verbal_expression = VerEx()
+```
+
+## Developer setup : running the tests
+```bash
+python setup.py test
+```