Make sure we do not loose the key when flatening the array
This should fix #1599
Refactored `__buildNavigation`; Seperate the 3 builds into their own method for more readability
Make it possible to add target attributes on links from extensions
Updated the extension doc
Merge pull request #1600 from DeuxHuitHuit/content.publish

Fix up lost keys when flattening $_FILES array and fix #1599
Fix send_email filter
Merge pull request #1602 from vlad-ghita/patch-1

Fix send_email filter
Merge pull request #1601 from DeuxHuitHuit/buildnav

Refactored `__buildNavigation` and added target attribute for extension links
Initial work restoring 404 handling in Datasources and catching recursive 404's. RE: #1539
Handle when REDIRECTONEMPTY is set
Merge branch 'integration' of git://github.com/symphonycms/symphony-2 into integration