Homebrew/homebrew-versions — pull request #580 by nrodrigues (2014-12-03 01:14:04+00:00)
Title: Boost 1.55

Boost has been upgraded to 1.56 in main brew tap,
but some software will only build with this specific version.

Based on last commit before upgrade to 1.56: https://github.com/Homebrew/homebrew/commit/a252214738599120551262afe4137152cc28dbb9