Do not silence download errors when request errback raises an exception
Do not log IgnoreRequest exceptions as download failures
Update the second code example

Update the second code example to reflect the last change in the first example.
remove minor reference to 'scrapy server' command
Merge pull request #400 from irgmedeiros/patch-2

Update the second code example
.remove_namespaces(): remove namespaces on elements' attributes
remove no longer existent examples from doc_files used in bdist_rpm. closes GH-417
robotstxt mid multi spider support removed
httpauth mid multispider support removed
useragent mid multi spider support removed
downloadtimeout mid multi spider support removed
Merge pull request #422 from nramirezuy/downloadtimeout-multispider

downloadtimeout mid multi spider support removed
Merge pull request #421 from nramirezuy/useragent-multispider

useragent mid multi spider support removed
Merge pull request #420 from nramirezuy/httpauth-multispider

httpauth mid multispider support removed
Merge pull request #419 from nramirezuy/robotstxt-multispider

robotstxt mid multi spider support removed
defaultheaders multi spider support removed
Merge pull request #423 from nramirezuy/defaultheaders-multispider

defaultheaders multi spider support removed
engine multispider support removed
fix doc typo
Merge pull request #416 from redapple/attrnamespaces

.remove_namespaces(): remove namespaces on elements' attributes