universal_archs returns ArchitectureListExtension
Skip the check for Xcode on non-OSX systems
git: Disable OS X keychain helper Closes #1
GCC is named gcc-4.2 on MacOS and gcc elsewhere
brew update: Pull from the branch linuxbrew

Taps still pull from the branch master.
Closes #4
Disable m32 and m64 on non-OSX systems. Closes #8
Replace the README for Linuxbrew

Add some basic documentation.

Closes #10.

Add ruby 1.8.6 requirement

For now, it seems that homebrew-core requires Ruby 1.8.6

Known limitations of Ruby 1.8.5:
* RUBY_PATCHLEVEL is not defined
* instance_variable_defined? is not defined
* pathname.rb:223 - 'Digest::SHA2' => 'Digest::SHA256' is necessary

Closes homebrew/linuxbrew#12
Closes homebrew/linuxbrew#15

Add instructions to set LD_LIBRARY_PATH in .bashrc

Closes #9
Skip the compiler version check on non-OSX systems

Closes homebrew/linuxbrew#5
When the root cache is not writable use home_cache

The home_cache is `~/Library/Caches/Homebrew` on MacOS and
`~/.cache/Homebrew` on other systems.
Closes Homebrew/linuxbrew#17.
boost: Fix for non-OSX systems
Merge branch 'master' into linuxbrew

Conflicts:
	Library/Homebrew/cmd/update.rb
	Library/Homebrew/extend/ENV/std.rb
	modified:   .gitignore
	new file:   Library/Taps/homebrew-apache
	new file:   Library/Taps/homebrew-boneyard
	new file:   Library/Taps/homebrew-completions
	new file:   Library/Taps/homebrew-dupes
	new file:   Library/Taps/homebrew-games
	new file:   Library/Taps/homebrew-headonly
	new file:   Library/Taps/homebrew-science
	new file:   Library/Taps/homebrew-versions
	new file:   Library/Taps/homebrew-x11
	new file:   Library/Taps/sennychu-tap
	modified:   Library/Taps/homebrew-dupes (modified content)
	modified:   Library/Taps/homebrew-science (modified content)
	modified:   .gitignore
	modified:   Library/Taps/homebrew-dupes (modified content)
	modified:   Library/Taps/homebrew-science (modified content)
	modified:   .gitignore
	modified:   Library/Taps/homebrew-dupes (modified content)
	modified:   Library/Taps/homebrew-science (modified content)
	new file:   Library/LinkedKegs/binutils
	new file:   Library/LinkedKegs/coreutils
	new file:   Library/LinkedKegs/expat
	new file:   Library/LinkedKegs/findutils
	new file:   Library/LinkedKegs/libpcap
	new file:   Library/LinkedKegs/nano
	new file:   Library/LinkedKegs/ncurses
	new file:   Library/LinkedKegs/pkg-config
	new file:   Library/LinkedKegs/xz
	modified:   Library/Taps/homebrew-dupes (modified content)
	modified:   Library/Taps/homebrew-science (modified content)
Merge https://github.com/Homebrew/linuxbrew into linuxbrew

* https://github.com/Homebrew/linuxbrew:
  boost: Fix for non-OSX systems
  When the root cache is not writable use home_cache
  Skip the compiler version check on non-OSX systems
  Replace the README for Linuxbrew
  Disable m32 and m64 on non-OSX systems. Closes #8
  brew update: Pull from the branch linuxbrew
  GCC is named gcc-4.2 on MacOS and gcc elsewhere
  git: Disable OS X keychain helper Closes #1
  Skip the check for Xcode on non-OSX systems
  universal_archs returns ArchitectureListExtension

Conflicts:
	Library/Homebrew/cmd/doctor.rb
	.git/MERGE_HEAD

	modified:   Library/Formula/boost.rb
	modified:   Library/Formula/git.rb
	modified:   Library/Homebrew/cmd/doctor.rb
	modified:   Library/Homebrew/cmd/update.rb
	modified:   Library/Homebrew/extend/ENV/std.rb
	modified:   Library/Homebrew/global.rb
	modified:   Library/Homebrew/macos.rb
	modified:   README.md
	modified:   Library/Taps/homebrew-dupes (modified content)
	modified:   Library/Taps/homebrew-science (modified content)