bugfix for coursera
bugfix for windows domain env
refine proxy.pac
change ablock url
disbale whitelist for adblock plus easylistchina
bugfix for adblock2pac
bugfix for crlf
add doubaleclick ablock rule
bugfix for crlf
refine proxy.pac
fix 12944

https://code.google.com/p/goagent/issues/detail?id=12944
Merge pull request #3 from v3aqb/12944

fix 12944