Fix block ading on stack page
removing errant file
content tweaks
fixing sitemap issue; newsflow new sample content'
Forgot a file
Make the error handler handle debug off better
Fix config renderer, use `json_encode` instead of `add_slashes`.

fixes #1038
Fix 5.3 incompatibility
Fix #1036
Merge branch 'master' of github.com:concrete5/concrete5-5.7.0
Fix #1039
fix #1040
content exporter
Make the 'this doesn't work yet' message show up when errors are disabled.