Rename allocator.hpp.
Merged revisions 44051 via svnmerge from https://svn.boost.org/svn/boost/branches/unordered/dev
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r44051 | danieljames | 2008-04-05 13:11:43 +0100 (Sat, 05 Apr 2008) | 1 line
Rename allocator.hpp to make way for a new header.