[phobos] [dlang/installer] 7dec26: support feature branch previews in install script

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/dlang/installer
  Commit: 7dec26d5f2c849d51ee32b61ef41ec18157a190a
      https://github.com/dlang/installer/commit/7dec26d5f2c849d51ee32b61ef41ec18157a190a
  Author: Martin Nowak <code at dawg.eu>
  Date:   2016-10-21 (Fri, 21 Oct 2016)

  Changed paths:
    M script/install.sh

  Log Message:
  -----------
  support feature branch previews in install script

- resolve nightlies.dlang.org/dmd-branch/LATEST to
  e.g. dmd-branch-2016-10-21
- use branch in basename of file dmd.$branch.$os


  Commit: 32a27a294f74e291a8b9b78644dbd831e146521c
      https://github.com/dlang/installer/commit/32a27a294f74e291a8b9b78644dbd831e146521c
  Author: Martin Nowak <code at dawg.eu>
  Date:   2016-10-21 (Fri, 21 Oct 2016)

  Changed paths:
    M script/install.sh

  Log Message:
  -----------
  Merge pull request #200 from MartinNowak/feature_branches

support feature branch previews in install script


Compare: https://github.com/dlang/installer/compare/844f0444d7c7...32a27a294f74