Network: rename Network to Networks

This change removes the most common ambiguities.
As the network module is not representative of a class, the lower case
has been used.

src/networks.js

@@ -0,0 +1,40 @@
+// https://en.bitcoin.it/wiki/List_of_address_prefixes
+// Dogecoin BIP32 is a proposed standard: https://bitcointalk.org/index.php?topic=409731
+module.exports = {
+  bitcoin: {
+    bip32: {
+      pub: 0x0488b21e,
+      priv: 0x0488ade4
+    },
+    pubKeyHash: 0x00,
+    scriptHash: 0x05,
+    wif: 0x80
+  },
+  dogecoin: {
+    bip32: {
+      pub: 0x02facafd,
+      priv: 0x02fac398
+    },
+    pubKeyHash: 0x1e,
+    scriptHash: 0x16,
+    wif: 0x9e
+  },
+  litecoin: {
+    bip32: {
+      pub: 0x019da462,
+      priv: 0x019d9cfe
+    },
+    pubKeyHash: 0x30,
+    scriptHash: 0x05,
+    wif: 0xb0
+  },
+  testnet: {
+    bip32: {
+      pub: 0x043587cf,
+      priv: 0x04358394
+    },
+    pubKeyHash: 0x6f,
+    scriptHash: 0xc4,
+    wif: 0xef
+  }
+}