WB 2.08.x

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

! update INSTALL and UPGRADE instruction to 2.8.3 (Tks to Ruebenwurzel)

small changes in INSTALL and UPGRADE (Tks to unawave2)
update upgrade-script showing from Version to Version (Tks to unawave2)
add Servicepack version to header.htt

add Instructions for droplets

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