Add make install

[alichtman]

It would be nice to be able to install this to /usr/local/bin easily.

[mikesart]

Thanks Aaron!

[motiejus]

I think it should default to /usr/bin and honor $PREFIX, then distros can use this target too.

[alichtman]

/usr/bin is for distro-managed binaries, so having $ make install put it there would be incorrect, and may break unexpectedly in the future. https://unix.stackexchange.com/a/8658

I think installing the binary here would have to be a decision made by package maintainers for each distro (and another target could be created for distros to use, like make install-for-distro).

On the $PREFIX suggestion -- I found https://www.gnu.org/software/make/manual/make.html#Directory-Variables to explain it. That seems reasonable to me.

[motiejus]

On the $PREFIX suggestion -- I found https://www.gnu.org/software/make/manual/make.html#Directory-Variables to explain it. That seems reasonable to me.

Can you make a follow up PR?