[phobos] [D-Programming-Language/phobos] ec9965: Add BitFlags template

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/phobos
  Commit: ec9965d656a2d6f94205db2e747d0739e5c05768
      https://github.com/D-Programming-Language/phobos/commit/ec9965d656a2d6f94205db2e747d0739e5c05768
  Author: Luca Niccoli <lultimouomo at gmail.com>
  Date:   2014-12-10 (Wed, 10 Dec 2014)

  Changed paths:
    M std/typecons.d

  Log Message:
  -----------
  Add BitFlags template

BitFlags is a typecons template for storing OR combinaton of enum
values in a type safe fashion.


  Commit: ecd25fdd269658b63391af174c18e474969f49f4
      https://github.com/D-Programming-Language/phobos/commit/ecd25fdd269658b63391af174c18e474969f49f4
  Author: H. S. Teoh <hsteoh at quickfur.ath.cx>
  Date:   2014-12-13 (Sat, 13 Dec 2014)

  Changed paths:
    M std/typecons.d

  Log Message:
  -----------
  Merge pull request #2058 from lultimouomo/flags

Add Flags template


Compare: https://github.com/D-Programming-Language/phobos/compare/4ab8d897e349...ecd25fdd2696