Correct return values: PROCESSED or CALL_AGAIN
Merge pull request #315 from To1ne/patch-1

Correct return values: PROCESSED or CALL_AGAIN
Increased env buf size 4096 -> 8192. Passing TMPDIR to CGI.
examples/html -> examples/chat_html_root
Merge branch 'master' of ssh://github.com/valenok/mongoose
use `mg_set_request_handler`