Log Message:
Changes 1.46.1:
Asio:
* EV_ONESHOT seems to cause problems on some versions of Mac OS X, with the
  io_service destructor getting stuck inside the close() system call. Changed
  the kqueue backend to use EV_CLEAR instead.
* Fixed compile failures with some versions of g++ due to the use of anonymous
  enums.
* Fixed a bug on kqueue-based platforms, where some system calls that
  repeatedly fail with EWOULDBLOCK are not correctly re-registered with kqueue.
* Changed asio::streambuf to ensure that its internal pointers are updated
  correctly after the data has been modified using std::streambuf member
  functions.
* Fixed a bug that prevented the linger socket option from working on platforms
  other than Windows.
Fusion:
* Fix disable_if for Visual C++ 7.1/8.0
Filesystem:
* Fix for STLPort.
* PGI large file support
Graph:
* Bug fixes
Icl:
* Intersects for interval_maps and segment_type/element_type.
* Fixed some ambiguous calls to functions in boost and std namespaces.
* Other bug fixes, and documentation fixes.
Math:
* Several minor bug fixes.
Polygon:
* Disabled 45-degree booleans optimization.
Proto:
* Make display_expr copyable.
* Fix const correctness problem in pass_through.
Property Tree:
* Fix compile error in JSON parser.
Signals2:
* Fix unused parameter warning.
TR1:
* Allow specialization of std::tr1::hash.
* Improved support for Pathscale and Sun compilers.
Unordered:
* Add missing copy constructors and assignment operators when using rvalue
  references.