Updated changelog for issue 7937.
Merge pull request #611 from jmdavis/traits

Some tweaks to unsigned.
Fix issue 7948
Add Example to SList.insertAfter documentation

Along with matching unit test.
Merge pull request #628 from eco/patch-3

Add Example to SList.insertAfter documentation
Fix issue 8022 BigInt division bug (2)
Fix for issue# 8233.

std.array.array fails to compile with ranges of immutable elements which have a length property
Use toUTFz's better description for toStringz

Also fix typo.
Merge pull request #631 from eco/patch-4

Fix typos and inconsistency in toStringz documentation
Document std.stdio.{stdin,stdout,stderr}.
Rename isStreamingDevice to isFileHandle and deprecate the old name.
Merge pull request #625 from alexrp/stdio-cleanup

Various std.stdio cleanups.
Merge pull request #630 from jmdavis/8233

Fix for issue# 8233.
Updated changelog for fix to issue# 8233.
fix Issue 8240 - std.algorithm.joiner and empty inputRangeObject

In this case, _current member is invalid at the start of iteration.
Then joiner should have additional member _valid_current.
Merge pull request #632 from 9rnsr/fix8240

Issue 8240 - std.algorithm.joiner and empty inputRangeObject
Updated changelog for fix for issue 8240.
Add seed(InputRange) overload to MersenneTwisterEngine
Merge pull request #627 from jpf91/random-seed

Add seed(InputRange) overload to MersenneTwisterEngine
Issue 8214 - blocking option for TaskPool.finish()

Add backwards compatible blocking option to finish().  Remove disabled
join() method.  Add unit tests for finish().