fix calculation of average session memory

WOStats page did show wrong or even negative numbers
better naming of method
track thread names for warn traces
minor fixes
added index creation for MicrosoftSQL
Merge branch 'master' of ssh://cthullu.selbstdenker.com:7999/WO/wonder into index_for_mssql
Merge pull request #530 from jburzler/index_for_mssql

Index for mssql
Merge pull request #508 from darkv/statistics_patch

Wrong session memory on statistics page
fix some javadocs
remove unused calls
Refactored Linux startup scripts:
* Added Init Info Section with description, dependecies and runlevels
* Starting as a dedicated User is possible
* Create Logfile if not existing
* Create Logrotate Job if available
* Added Status Call for wotaskd script
ERJQueryMobil

Newer jQueryMobile Versions need a gif, not the png, to display the
spinning wheel.
Merge pull request #532 from swklein/master

ERJQueryMobil missing loader image
Refactored Linux startup scripts:
* Added Timestamp to logs
* Added stdout and stderr Output to log files
resolve #412

if you bind a stylesheet filename in less format (i.e. having a ".less" extension) the rel attribute of the tag will use "stylesheet/less"
Merge pull request #531 from dane0542/linux-startup-scripts

Refactored Linux startup scripts:
log out Wonder version info
add missing jar
use correct version number in API documentation
automatically put current year in javadoc copyright