Improvements to INSTALL. Mention Homebrew recipe.
Improvements to INSTALL. Mention Homebrew recipe.

shinnok/tarsnap-gui,codarrenvelvindron/tarsnap-gui,shinnok/tarsnap-gui,Tarsnap/tarsnap-gui,Tarsnap/tarsnap-gui,shinnok/tarsnap-gui,shinnok/tarsnap-gui,codarrenvelvindron/tarsnap-gui,Tarsnap/tarsnap-gui,shinnok/tarsnap-gui,Tarsnap/tarsnap-gui,Tarsnap/tarsnap-gui