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

Finish FileHandle documentation
Complete SocketHandle documentation

Updated documentation templates to include cross-reference
Fixed documentation build (especially regarding cleanup)
Cleaned up BUG, FIXME, TODO and IDEA items
More SocketLibrary documentation

Renaned directory satscons to senfscons

add missing retrive_filehandle overload
fix operator bool (use safe bool idiom)
add GenericSockAddr as default Address implementation

Implemented EAGAIN / EWOULDBLOCK and EINTR handling
Made the generic connect implementation always block
Implemented SocketHandle::state() infrastructure

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