refine gae handler filters
refine urlfetch
add contributors
refine HostsFilter
Update proxy.py
new error page
Merge pull request #12 from mengzhuo/3.0

new error page
bugfix
bugfix
refine dns resolve
bugfix
refine proxy.ini
Update ntlmaps.bat
python2 is not installed by default
Update addto-startup.py
Merge pull request #5 from goagent/3.0

Sync