Update README.md

Author: teschlg

README.md

@@ -24,10 +24,12 @@ The tools contained are:
 * linear codes: Hamming distance, left standard form, parity check matrix
 
 * Matrix: a class for Matrices (inverse, det, reduced echelon form, etc.)
-* Poly: a class for polynomials (division, modulo)
+* Poly: a class for polynomials (division, modulo, irreducibility test, Lagrange interpolation)
 * Zmod: a class for the ring of integers modulo an integer
 * GF2: a class for Galois fields GF(2^n)
 * Goppa: a class for encoding and decoding Goppa codes
+* CyclicCode: a class for encoding and decoding cyclic codes
+* ReedSolomonCode: a class for encoding and decoding Reed-Solomon codes
 
 * BlockCipher: a class implementing the usual modes of operation (ECB, CBC, GCM, etc.)
 * AESCipher: individual AES operations