Merge branch '2.0' of https://github.com/goagent/goagent into 2.0

Conflicts:
	local/proxy.pac
'201303151128'
'201303151129'
update lastest proxy.pac
test google_cn iplist speed to decide whether to switch
fix some startup issue.
refine error_html
refine code as sublimelint
output speed test result
speedtest 4 sample hosts
make sublimelinter happy
serve HTTP/0.9 request
refine proxy.py
refine common.info(), pac file path works with IE10 now.
increase need_switch threshold as wwqgtxx's comments.
Update wsgi.py

add "公益404" in error message html
Merge pull request #75 from cseparkman/patch-1

Update wsgi.py
comment <script> label from qq.com for security concern
trigger pacfile auto update after half an hour.
update to lastest proxy.pac