install.sh missing some features

[mcarifio]

Installing on linux is curl -sSfL https://get.tur.so/install.sh|bash. The script seems to be missing two features from this style of installion: 1) setting the INSTALL_DIRECTORY and 2) skipping the modification of the shell profile.

I tried to find install.sh in the repo but couldn't. Perhaps it's generated from the go sources. Therefore I've attached my suggestions to install.sh to this issue. Use it as you see fit. Thanks.

install.sh.txt