Fix CLI tool installation in GitHub for Mac

Symlinks the 'github' CLI binary that enables opening GitHub for Mac
from the command line. As per the defaults for the application, the
internal `github_cli` binary is symlinked simply as `github`.

Note this intetionally does *not* also symlink the bundled versions.
of `git` itself, as anyone using brewcask is going to want to be able
to manage those normally via homebrew.`
Added OpenSong

OpenSong is a free, open-source software application created to manage lyrics, chords, lead sheets, overheads, computer projection, and more.

OpenSong releases are available for Microsoft Windows, Mac OS X, and Linux operating systems. Many languages are available as well thanks to our amazing community!
fix bee download url
Merge pull request #3950 from JeanMertz/patch-1

fix bee download url
Update Mactracker to v7.3.1
Merge pull request #3952 from macprince/mactracker

Update Mactracker to v7.3.1
Merge pull request #3892 from mroth/github

Fix CLI tool installation in GitHub for Mac
Merge pull request #3946 from alebcay/opensong

Added OpenSong
Add Fitbit Connect v1.0.1.5104
Merge pull request #3938 from dlokesh/fitbit-connect

Add Fitbit Connect v1.0.1.5104
Redirect user to cask issues page, fixes #1251
Merge pull request #2971 from voanhduy1512/improve_cli

Redirect user to cask issues page, fixes #1251
Merge branch 'master' of https://github.com/phinze/homebrew-cask