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More layout fixes using XSLT

Extended the Sniffer example to optionally use the Scheduler
Some additional small documentation fixes

Unified emacs Local Variables

Implemented IPv6 fragment extension
Add output streaming (operator<<) for ParseInt parsers

Complete TCPv6 unit testing

Set fixed column width in member docs

Add HTML tidy postprocessing and error filtering to SENFScons doxygen method
Add doclib/filter.pl INPUT_FILTER to fix example code indentation in the documentation
Add a glossary to the Socket documentation
Furthher Socket library docs (Protocol classes)

Further Socket library documentation

Extend the CSS rules some more for advanced browsers (probably everyone except IE)

Finish FileHandle documentation
Complete SocketHandle documentation