Merge to master for 1.59.0 release

Merge to master for 1.59.0 release

Merge to master for 1.59.0 release

Merge branch 'develop'

Merge pull request boostorg#1 from jzmaddock/patch-1

Update Jamfile.v2

I think it's okay, it's already been applied to develop and seems to be working okay.

Fixed two tests to work with C++11/libc++. The tests attempted to com…

…pare two ostream&, but didn't really. In c++03, both decayed to void *, which wre then compared. In c++11, the ostreams are comvertible to bool, but only explicitly, and this failed to compile. Use a custom struct with operator== instead of ostream in these tests instead.

Release 1.55.0

[SVN r86621]

Release 1.54.0

[SVN r84923]

Release 1.54.0 beta1

[SVN r84619]

Release 1.53.0

[SVN r82734]