* Make the library modular usable.
* Switch to library requirements instead of source. As source puts extra source in install targets.
* Add missing lib reference.
* Add requires-b2 check to top-level build file.
* Bump B2 require to 5.2
* Change all <source> references to <library>.
* Update copyright dates.
* Move inter-lib dependencies to a project variable and into the build targets.
* Update build deps.
fixed a NO_LOCALE build error the benchmark build discovered,
updated ignored argument handling and fixed build warnings in clang,
changed CI build scripts to build from top level of library
Adjust tests to use always use static linking to Boost.Test, since
linking to the shared version requires test changes.
Patch from Juergen Hunold.
[SVN r35989]
