Some fixes for MSVC 14 CTP 2.
Clean up example.
More fixes in priority_scheduler example.
Add fork/join example.
Remove spurious const qualifier from timer operations.
Run priority_scheduler until explicitly stopped.
Add missing mutable.
Remove rvalue ref qualifiers to match proposal text.
Add comparison operators.
Fix typo.
Squashed 'site_scons/' changes from 532242f..365e409

365e409 Update settings and conf file functionality, removing --configure

git-subtree-dir: site_scons
git-subtree-split: 365e409a3fa74a08835dd57cb0e9e2041e83450c
Merge commit 'd0df87071f96b59837ffeb12312b0034dd7aeaa7'
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/ja11sop/executors
Add boost thread dependency introduced in boost 1.56