Annotate typedef differences between sets and maps
Start work on tutorial. Rename examples for brevity.
Remove an obsolete comment. Clear a warning when compiling for 32-bit size_t.
Add BOOST_STATIC_ASSERT_MSG to verify Key and T are not std::string. Create example/set2_1st_try.cpp to demonstrate resulting error. Start writing tutorial.html. Clean up reference.html and add more flags comments. Make example/Jamfile.v2 static link as more likely to succeed on Windows. set1.cpp and set2.cpp tweaks. Fix cut-and-paste error in btree_bases.hpp.