Merge pull request #74 from BastusIII/master

autmatically adding csrf token to ajax requests.
Changed Demo Link
Integrated app name in  welcome email template
Update README.md
Merge pull request #75 from BastusIII/master

ReorderContentWidget to sort content via drag and drop / little adaption to ContentContainerController
Fixed missing optional tracking code
Added warning on user module disable & force post requests on user module enable/disable
Fixed broken notification links to user profiles when url rewriting is enabled.
Fixed problem on user settings where moduleId is not correct recognized
Fixed some translation entries
Intergrated a small introduction tour
Removed broken MentionWidget
Fixed broken image upload for firefox browsers
Disabled "Load more" button for mobile devices and empty streams
Updated favicon and shortcut icons
Updated tours texts