C++11 variadics

[Flast]

I know this PR is very very huge, but there is no new changes, except remove unused headers (325604c), regenerate preprocessed files (0d3abcc) and changelog (d85b832).

This is not a breaking change, i.e. no user code should be changed.

I tested on

• GCC 6.1.1 20160721 (Red Hat 6.1.1-4)
  • gnu++98 / 11 / 14 mode
• clang 3.8.0
  • gnu++98 / 11 / 14 mode
• MSVC
  • 8.0 (2005) - failed
  • 9.0 (2008) - passed
  • 10.0 (2010 SP1) - failed
  • 11.0 (2012 u5) - passed
  • 12.0 (2013 u5) - failed
  • 14.0 (2015 u2) - failed

I list all previous PRs for variadics.

• Prepare variadics #19 Prepare variadics
• Variadics: core/actor #21 Variadics: core/actor
• Restore copyright notice. #22 Restore copyright notice
• Variadics: core/call #23 Variadics: core/call
• Implement C++11 variadic templates based function_equal. #24 Implement C++11 variadic templates based function_equal
• Implement variadic based phx2_result. #25 Implement variadic based phx2_result
• variadics: core/function_eval #26 variadics: core/function_eval
• C++11 variadics based core/expression. #27 C++11 variadics based core/expression
• variadics: prepare for other components. #29 variadics: prepare for other components
• variadics: bind component. #30 variadics: bind component
• variadics: scope component #31 variadics: scope component
• variadics: expr macros #32 variadics: expr macros

I'll wait merging until it is approved.

[Flast]

Newer MSVC shows much of regressions. So, I'll fix those until 1.62 beta close.

[Lastique]

Please, revert the change from develop (or fix it if it's quicker) because it breaks a lot of Boost.Log tests and seeing test results during the release cycle is essential.

http://www.boost.org/development/tests/develop/developer/output/teeks99-09e-win2012R2-64on64-boost-bin-v2-libs-log-test-~hdr-expressions-attr~hpp-test-msvc-12-0-dbg-adrs-mdl-64-thrd-mlt.html

[djowel]

Ouch. @Flast, tell me if it's an easy fix, or we can revert for now.

[Flast]

I think revert is best for now.

[Flast]

done. I'll investigate this weekend.