Minor cleanup.
Minor cleanup.

* Attribution to Matthias for macos script
* Capitalize proper nouns like Vim and Tmux
* Remove Yosemite as supported os
* Remove link to Linux script

sjdweb/mac-bootstrap,joshukraine/mac-bootstrap,tadelv/mac-bootstrap,tadelv/mac-bootstrap,joshukraine/mac-bootstrap,sjdweb/mac-bootstrap,joshukraine/mac-bootstrap,tadelv/mac-bootstrap