Honor session hooks
Add tests around hook behaviour
Fix failing test to preserve behaviour
Parse cookies when users set custom Host header
Comment our reasonsing for the special cases
Fix typo
fixed typo
Merge pull request #1673 from daftshady/dev

fixed typo
fix doc for redirction and history

In current version of requests, allow_redirect is disabled by default
only for HEAD requests
Merge pull request #1675 from houqp/master

fix doc for redirction and history
Small grammar fix.
test out requests-trunk badge
Merge remote-tracking branch 'origin/master'
Update README.rst
fix unprotected build status link
Merge remote-tracking branch 'origin/master'
Use builtin_str for all auto-set header values.
Add clarification to MissingSchema error
use .format()
Add bit to docs about iter_content