Add C++14 extensions to 'equal' and 'mismatch'

git-svn-id: http://svn.boost.org/svn/boost/trunk@84206 b8fc166d-592f-0410-95f2-cb63ce0dd405
Hotfix to work around Boost.Build problem (it does not detect compiler version).

git-svn-id: http://svn.boost.org/svn/boost/trunk@84207 b8fc166d-592f-0410-95f2-cb63ce0dd405
geometry.index: introduced distance query - a generalized nearest query. distance calculation simplified. nearest query implemented using distance query. added path() predicate and query implemented using distance query as well.

git-svn-id: http://svn.boost.org/svn/boost/trunk@84209 b8fc166d-592f-0410-95f2-cb63ce0dd405