Version bump.

Author: haz

README.md

@@ -53,11 +53,21 @@ Complete documentation can be found at [readthedocs](https://python-nnf.readthed
 
 # Installing
 
+At least Python 3.4 is required.
+
+## Recommended
+
+Install with support for a variety of SAT solvers.
+
 ```sh
-pip install nnf
+pip install nnf[pysat]
 ```
 
-At least Python 3.4 is required.
+## Vanilla
+
+```sh
+pip install nnf
+```
 
 # Serialization
 

setup.py

@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name="nnf",
-    version='0.2.1',
+    version='0.3.0',
     author="Jan Verbeek, Christian Muise",
     author_email="jan.verbeek@posteo.nl; christian.muise@queensu.ca",
     description="Manipulate NNF (Negation Normal Form) logical sentences",