added a troubleshooting page for the email package. PR for problems please ;)
documented the new pipelining() method
documented "sessions without cookies"
documented nested sets dump_tree() method
added allow_x_headers to the Configuration docs
Fix DB::query() $type explanation
Merge pull request #558 from kenjis/fix_db

Fix DB::query() $type explanation
updated session docs
updated session docs
updated the usage of the custom rest method
fixed typo in session config
Merge pull request #559 from indigofeather/1.7/develop

fixed typo in session config
Merge remote-tracking branch 'upstream/1.7/develop' into 1.7/develop