refactor: make ipfs.add only work on single items

Author: achingbrain

packages/ipfs-http-client/src/add.js renamed to packages/ipfs-http-client/src/add-all.js

@@ -20,7 +20,7 @@ const urlSource = require('ipfs-utils/src/files/url-source')
  */
 function ipfsClient (options = {}) {
   return {
-    add: require('./add')(options),
+    addAll: require('./add-all')(options),
     bitswap: require('./bitswap')(options),
     block: require('./block')(options),
     bootstrap: require('./bootstrap')(options),

packages/ipfs-http-client/src/index.js

@@ -1,6 +1,6 @@
 'use strict'
 
-exports.add = require('./add')
+exports.addAll = require('./add-all')
 exports.block = {
   get: require('./block/get'),
   put: require('./block/put'),