Add AutoIndex tool from sandbox.
Integrate into Boost.Build.
Add HTML stylesheet options for Indexes.
Add rule to XSL stylesheets to place Indexes in their own HTML CSS class.
Fix regular expressions used.
Fix bad regular expression used for function name scanning.
Fix glitches in docs.
Force AutoIndex to build in release mode when built-on-demand.
Fix build errors from non-C++11 compilers.
Fix scanner to scan refentry's correctly.
Change preferred terms to use bold rather than just emphasis.
Updated tests to match.
Add install to std location.
Throw exception on precondition failure.
Fixes #7967.
Fix bug for situation where no suitable index location is found.