rm bscript circular dependencies

src/index.js

@@ -1,4 +1,13 @@
+var script = require('./script')
+
+var templates = require('./templates')
+for (var key in templates) {
+  script[key] = templates[key]
+}
+
 module.exports = {
+  bufferutils: require('./bufferutils'), // TODO: remove in 4.0.0
+
   Block: require('./block'),
   ECPair: require('./ecpair'),
   ECSignature: require('./ecsignature'),
@@ -7,9 +16,8 @@ module.exports = {
   TransactionBuilder: require('./transaction_builder'),
 
   address: require('./address'),
-  bufferutils: require('./bufferutils'), // TODO: remove in 4.0.0
   crypto: require('./crypto'),
   networks: require('./networks'),
   opcodes: require('bitcoin-ops'),
-  script: require('./script')
+  script: script
 }