message: Remove SJCL dependency from Xlm
  Summary: Use bitgo.decrypt() instead. SJCL is a dev dependency
  Reviewers: mtoda, kevin, bigly, tyler
  Subscribers: tyler
diff: @@ -4,7 +4,6 @@ const querystring = require('querystring');
  const url = require('url');
  const Promise = require('bluebird');
  const co = Promise.coroutine;
  -const sjcl = require('sjcl');
  const request = require('superagent');
  const BaseCoin = require('../baseCoin');
  @@ -250,7 +249,10 @@ class Xlm extends BaseCoin {
  try {
  if (!userKey.startsWith('S')) {
  - userKey = sjcl.decrypt(params.walletPassphrase, userKey);
  + userKey = this.bitgo.decrypt({
  + input: userKey,
  + password: params.walletPassphrase
  + });
  }
  keys.push(stellar.Keypair.fromSecret(userKey));
  @@ -260,7 +262,10 @@ class Xlm extends BaseCoin {
  try {
  if (!backupKey.startsWith('S') && !isKrsRecovery) {
  - backupKey = sjcl.decrypt(params.walletPassphrase, backupKey);
  + backupKey = this.bitgo.decrypt({
  + input: backupKey,
  + password: params.walletPassphrase
  + });
  }
  if (isKrsRecovery) {
  