print raw error when proxy raises an error.

I know it's dirty but that way we are sure that the error is displayed.
set an agent on proxy server to avoid too many opened conections when there

are many requests
add missing requirement
use graceful-fs for a better manageement of the file system
build
fix forum url in error messages
rename selective body parser file in snake case
build
extend the session duration to 7 days
build
update cookie session options format
build
testfix of #78
include and close #78
Merge pull request #80 from aenario/master

Configure the proxy so he could handle better a lot of requests