bump version to 3.1.2
refine paas
fix redirect
Merge pull request #198 from binyuj/fixredirect

fix redirect
remove `common.GAE_FETCHSERVER` attr
refine proxy.py
refine autorange
set http_util.max_timeout = 8
revert python27.zip for pycrypto
remove paas section
refine proxy.ini
refine paas
fallback to gunicorn.
update switchy options bak
Merge branch '3.0' of https://github.com/goagent/goagent into 3.0

Conflicts:
	server/gae/gae.py