readme update

README.md

@@ -0,0 +1,17 @@
+## anf.py
+
+Takes a boolean expression with 'not' (!) 'and' (AND) and 'or' (OR) in input and outputs its simplified ANF form (with XOR (⊕) and AND (⸱)).
+
+#### example:
+
+input:  
+```
+!X11 AND (!X3 AND !X4 OR X3 AND X4 OR X3 AND !X4 AND X12) OR X11 AND !X12 AND (X3 OR X4)
+```
+
+output:  
+```
+1⊕X11⊕X3⊕X4⊕(X3⸱X12)⊕(X4⸱X11⸱X12)⊕(X3⸱X4⸱X11)⊕(X3⸱X4⸱X12)
+```
+
+*term order may differ a little*