Updated Install Bash git completion (markdown)
As per information given when installing `bash-completion` from brew
Added Gentoo instructions
adding a comment re brew --prefix location
adding an alternate location for brew's git-completion file
matches current version of bash-completion
simplify install command
Fix link. Apparently that was the legacy homebrew repo
Add Arch Linux installation.
Update bash_completion path. See more @ trac (dot) macports (dot) org/wiki/howto/bash-completion
Not working for Ubuntu Studio 16.04
small typo, .bashprofile -> .bash_profile. Thanks for the docs!
clarified where to find your bash profile
fixes install command when git is already installed but bash-completion is not
Update MacPorts documentation.