experimental tuple move code moved to sandbox/tuple-move/boost/tuple

svn path=/sandbox/; revision=83070
tuple-move test added and error fixed for compilers supporting &&.

svn path=/sandbox/; revision=83071
Added tuple move and copy assignment, added tests for all handled classes, fixed errors

svn path=/sandbox/; revision=83072
tuple-move test disabled if BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION is defined

svn path=/sandbox/; revision=83073
rtree predefined translator renamed to index::translator<>
index::translator::def<> renamed to index::translator<>
index::translator::index<> removed
translator helpers removed or moved to index::default::translator namespace
some unneeded includes removed
docs updated

svn path=/sandbox-branches/; revision=83077