refactor: Rename Converter to FileStreamConverter

`Converter` is a too generic name, the new name implies what
it is about.

Author: vmx

src/utils/converter.js src/utils/file-stream-converter.js

@@ -6,7 +6,7 @@ const TransformStream = require('readable-stream').Transform
   Transforms a stream of {Name, Hash} objects to include size
   of the DAG object.
 
-  Usage: inputStream.pipe(new Converter())
+  Usage: inputStream.pipe(new FileStreamConverter())
 
   Input object format:
   {
@@ -22,7 +22,7 @@ const TransformStream = require('readable-stream').Transform
     size: 20
   }
 */
-class ConverterStream extends TransformStream {
+class FileStreamConverter extends TransformStream {
   constructor (options) {
     const opts = Object.assign({}, options || {}, { objectMode: true })
     super(opts)
@@ -41,4 +41,4 @@ class ConverterStream extends TransformStream {
   }
 }
 
-module.exports = ConverterStream
+module.exports = FileStreamConverter

src/utils/send-files-stream.js

@@ -6,7 +6,7 @@ const isStream = require('is-stream')
 const once = require('once')
 const prepareFile = require('./prepare-file')
 const Multipart = require('./multipart')
-const Converter = require('./converter')
+const FileStreamConverter = require('./file-stream-converter')
 
 function headers (file) {
   const name = file.path
@@ -132,7 +132,7 @@ module.exports = (send, path) => {
           options.progress(d.Bytes)
         }
       })
-      const convertedResponse = new Converter()
+      const convertedResponse = new FileStreamConverter()
       convertedResponse.once('end', () => retStream.push(null))
       convertedResponse.on('data', (d) => retStream.push(d))
       response.pipe(convertedResponse)