Merge pull request #2067 from Guite/1.4

fixed redirect with subfolders
remove all WebfactoryExceptionsBundle references and all related twig template overrides
add twig template that only contains body
finalize removal of webfactoryExceptionsBundle
Merge pull request #2068 from craigh/ExceptionFix

[WIP] Prod Error/Exception display fix
load bootstrap.php and plugins in new controller. refs #1792
handle RouteNotFoundException refs #1878
update route docs
remove `spool` parameter from swiftmailer config. fixes #1993
Merge pull request #2070 from craigh/mailerFix

remove `spool` parameter from swiftmailer config. fixes #1993
added code for installing Routes module as part of 1.4.0 update