Updated readme and fixed typos

RNS/Link.py

@@ -437,6 +437,7 @@ class Link:
 		if self.__encryption_disabled:
 			return plaintext
 		try:
+			# TODO: Optimise this re-allocation
 			fernet = Fernet(base64.urlsafe_b64encode(self.derived_key))
 			ciphertext = base64.urlsafe_b64decode(fernet.encrypt(plaintext))
 			return ciphertext

RNS/Resource.py

@@ -22,7 +22,7 @@ class Resource:
 	#
 	# A small system in this regard is
 	# defined as a Raspberry Pi, which should
-	# be able to compress, encrypt and hasmap
+	# be able to compress, encrypt and hashmap
 	# the resource in about 10 seconds.
 	MAX_EFFICIENT_SIZE   = 16 * 1024 * 1024