WB 2.08.x

! update revision properties for all files
- include/Sensio/Twig remove Version 1.13.2

! account split html and code
+ add signup activation registering
+ add missing icons in themes

update templates allcss and round (Tks to Rübenwurzel)
Add UPGRADE Instructions
Update INSTALL Instructions
Optimize config.php handling for installation

Created 2.8.x branch

updated basic templates according the template guidelines