Reviewed by Stinson.

MAINT-1890 FIX Removing previous hacky fix for this issue.  The better solution is to clamp the update_period to a reasonable number of frames (32).

Given that third-party libraries (such as Boost) can and do use those names,
properly namespace-scoped, it's unpardonable to break any such innocent usage
with a macro. Given the pervasiveness of the need, introduce a header file
with the requisite #undef directives.

Instead of compatibility mode, #defining BOOST_FILESYSTEM_VERSION to 2 only
gets you a compile error these days.

On Windows, LLPrimitive.cmake named four Boost libraries with names ending in
the string 1_45. Now that we're trying to upgrade Boost to 1.52, those
suffixes are inappropriate. Fortunately the libraries in our current Boost
package do not have version-stamped names, so we hope this fix can survive
for several Boost upgrades to come.

accidentally left some debug output on, turned it back off for merge to trunk

LLUI::setupPaths() went away with DRTVWR-210.