Added alternative installation instruction

[Zhomart]

This method might be convenient. And this instruction will be helpful to new developers.

[samueleaton]

I'd opt to rename this from Installation using ruby script to Quick Installation.

[Zhomart]

@samueleaton Please change if needed, as English is not my native language, I might use some cumbersome words to describe things.

[samueleaton]

Thanks for this!

Does shards have an option for running a post-install script? I know that was in discussion before but am not sure if it has been implemented.

If thats the case, I would rather that tractive is compiled automatically and placed in the bin directory with the user having to manually place some command in a makefile

[Zhomart]

What do you think if I change all ./sentry [options] examples to ./bin/sentry [options]?

I think binaries should be in ./bin/ directory.

[samueleaton]

Can you share some examples of other crystal projects or guides where it is common to store binaries in a [project name]/bin directory?

[Zhomart]

The official shards library puts binaries in ./bin/ folder. https://github.com/crystal-lang/shards/blob/master/SPEC.md#targets