Give each tool a dir

[mrienstra]

To support Antidote ( https://getantidote.github.io/ ), put each tool in a subdirectory.

Without these changes -- as far as I can tell -- it's only possible to install all of the tools using Antidote, using:

morgant/tools-osx kind:path path:src

May also help other shell package managers that otherwise would not be able to install individual tools.

Tested locally by adding the following to my ~/.zsh_plugins.txt file:

mrienstra/morgant-tools-osx branch:give_each_tool_a_dir kind:path path:src/trash

(and then running antidote bundle <~/.zsh_plugins.txt >~/.zsh_plugins.zsh, since that's how I chose to setup Antidote, see https://getantidote.github.io/ for details)

PS: I would've opened an issue first, but that doesn't seem to be an option.