title: __init__() got an unexpected keyword argument '_job'
body: <p>I am trying to use <strong>scrapyd</strong> with scrapy.</p>
  
  <p>When I use this the code below it works fine.</p>
  
  <pre><code>import scrapy
  from scrapy.selector import Selector
  from scrapy.spiders import CrawlSpider
  from shikari.items import shikariItem
  from scrapy.http import Request
  
  
  class Radiate(scrapy.Spider) :
    name = "run"
  
    allowed_domains = ["google.com"]
    start_urls = ['http://google.com']
  
    def parse(self, response) :
      item = shikariItem () 
      sel = Selector (response)
      item['url'] = response.url
      return item
  </code></pre>
  
  <p><strong>But when I use it with selenium, it doesn't</strong></p>
  
  <pre><code>import scrapy
  from pyvirtualdisplay import Display
  from selenium import webdriver
  from shikari.items import shikariItem
  
  
  class Radiate(scrapy.Spider) :
    name = "run"
  
    allowed_domains = ["google.com"]
    start_urls = ['http://google.com']
  
    def __init__(self):
     display = Display(visible=0, size=(800, 600))
     display.start()
     self.driver = webdriver.Chrome('/usr/bin/chromedriver')  
  
    def parse(self, response) :
      item = shikariItem () 
      item['url'] = self.driver.get(response.url)
      return item
  
    def teardown(self): 
      display.stop()
      self.driver.close()
  </code></pre>
  
  <p>My spider never runs. In jobs it gets listed under finished, and on error log I see <code>exceptions.TypeError: __init__() got an unexpected keyword argument '_job'</code>.</p>
  
  <p>Here is the full error log</p>
  
  <pre><code>2016-02-23 19:42:06 [scrapy] INFO: Scrapy 1.0.5 started (bot: scrapybot)
  2016-02-23 19:42:06 [scrapy] INFO: Optional features available: ssl, http11
  2016-02-23 19:42:06 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'shikari.spiders', 'FEED_URI': 'file:///var/www/html/shikari/scrapyd-client-master/items/shikari/run/82776010da6511e5b08d1288e0cebe8d.jl', 'CONCURRENT_REQUESTS_PER_DOMAIN': 1, 'SPIDER_MODULES': ['shikari.spiders'], 'USER_AGENT': 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0', 'FEED_FORMAT': 'csv', 'LOG_FILE': 'logs/shikari/run/82776010da6511e5b08d1288e0cebe8d.log', 'DOWNLOAD_DELAY': 4}
  2016-02-23 19:42:06 [scrapy] INFO: Enabled extensions: CloseSpider, FeedExporter, TelnetConsole, LogStats, CoreStats, SpiderState
  2016-02-23 19:42:06 [twisted] ERROR: Unhandled error in Deferred:
  2016-02-23 19:42:06 [twisted] ERROR: Unhandled Error
  Traceback (most recent call last):
    File "/usr/local/lib/python2.7/dist-packages/scrapy/cmdline.py", line 150, in _run_command
      cmd.run(args, opts)
    File "/usr/local/lib/python2.7/dist-packages/scrapy/commands/crawl.py", line 57, in run
      self.crawler_process.crawl(spname, **opts.spargs)
    File "/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py", line 153, in crawl
      d = crawler.crawl(*args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1237, in unwindGenerator
      return _inlineCallbacks(None, gen, Deferred())
  --- &lt;exception caught here&gt; ---
    File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1099, in _inlineCallbacks
      result = g.send(result)
    File "/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py", line 70, in crawl
      self.spider = self._create_spider(*args, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py", line 80, in _create_spider
      return self.spidercls.from_crawler(self, *args, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/scrapy/spiders/__init__.py", line 50, in from_crawler
      spider = cls(*args, **kwargs)
  exceptions.TypeError: __init__() got an unexpected keyword argument '_job'
  </code></pre>
  
  <p>What do I need to do so I don't get the error?</p>