Replace deprecated view helper

The "renderFlashMessages" view helper has been marked as deprecated
in favor of "flashMessages" a while ago.
Also use the "div" renderMode to have TYPO3 styles flash messages
by default
Update CSS for the TYPO3 6.0 login mask

The styles have been changed, the provided custom style sheet should
include those changes into its own styles. Otherwise the layout is
broken, eg: the installation name is under the username input field.
Merge pull request #5 from Trenker/v6-login

V6 login
changed to-top link
changed to-top link
Merge pull request #6 from wlwwt/master

to top link after content elements
[FEATURE] Add default page tree icon for records
[TASK] Remove pid definition for BE layouts
[TASK] Cleanup ce layouts
[TASK] Change dev/prod settings
[TASK] Description how to include files
[TASK] Example for url in dev ts
[TASK] Fix wrong path
[FEATURE] Add social media icons
[TASK] Switch notrimwrap for removing empty space in class name
[TASK] Move configuration
[TASK] Fix footer
[FEATURE] Change class selection for tables to a select field
[TASK] Changes of TypoScript/TsConfig
Further templates