Moved more thread_safe_signals files over to
new directory structure.
Added files for doxygen home page
move thread_safe_signals to new location
Put svn command in verbatim block.
Removed absolute paths from Doxyfile.
Fix eol-style and mime-types
Got rid of doxygen-generated main page, instead integrated
its content into boostbook docs (note I'm building them with 
boostbook from sandbox/boost_docs now).
Indent with spaces instead of tabs, as specified by boost coding guidelines.
Removed some reminders of obsolete EPG namespace.
Pruned some dead debugging code.
track class no longer exists.
We aren't using visit_each anymore (unless backwards compatibility
for boost::trackable is brought back), so take it out of the
reference.
Minor documentation improvements.  Documented
boost::signalslib as the "official" namespace used by
thread_safe_signals.
Added an example program referenced in the tutorial.
Deleting example, because I want to instead create it with
an svn copy of the program from the signals library in the
main boost trunk.
Copied example from Boost.Signals in main boost trunk.
People should use slot_type to forward slots, not
slot_function_type.
Moved boost::signalslib::detail::slot_base to boost::signalslib::slot_base,
since it has been exposed in the API by one of the slot::track
methods.
More documentation improvements.  Fixed documentation of
some protected members using new docbook <access> tag.  Added
documentation of slot_base, now that it's no longer in
the detail namespace.  Added documentation of "preferred
syntax" slot class constructors.  Got rid of a bunch
of <simpara> (no longer needed after css tweak).
Fixed minor typo in comment.