aezeed: export wordlist and properties

To make it possible to use the wordlist used for aezeed outside of the
aezeed package we export certain properties of the word list and the
word list itself.

aezeed/cipherseed_test.go

@@ -16,7 +16,7 @@ type TestVector struct {
 	entropy          [EntropySize]byte
 	salt             [saltSize]byte
 	password         []byte
-	expectedMnemonic [NummnemonicWords]string
+	expectedMnemonic [NumMnemonicWords]string
 	expectedBirthday uint16
 }
 
@@ -37,7 +37,7 @@ var (
 			entropy:  testEntropy,
 			salt:     testSalt,
 			password: []byte{},
-			expectedMnemonic: [NummnemonicWords]string{
+			expectedMnemonic: [NumMnemonicWords]string{
 				"ability", "liquid", "travel", "stem", "barely", "drastic",
 				"pact", "cupboard", "apple", "thrive", "morning", "oak",
 				"feature", "tissue", "couch", "old", "math", "inform",
@@ -51,7 +51,7 @@ var (
 			entropy:  testEntropy,
 			salt:     testSalt,
 			password: []byte("!very_safe_55345_password*"),
-			expectedMnemonic: [NummnemonicWords]string{
+			expectedMnemonic: [NumMnemonicWords]string{
 				"able", "tree", "stool", "crush", "transfer", "cloud",
 				"cross", "three", "profit", "outside", "hen", "citizen",
 				"plate", "ride", "require", "leg", "siren", "drum",