Add directions to README for Windows Users

[DanielGGordon]

For example, if someone is using Git Bash for Windows, they will not have the ability to run the make command.
This command could be replaced by a few mkdir and a cp.

I was personally able to figure it out on my own, but it would be nice if the commands were simply in the README.

[RoryMiley]

I have run into the same issue, however have not been able to fix it...

[DanielGGordon]

@RoryMiley you can do it something like this-

Make a new directory like ~/.local/bin with the command mkdir ~/.local && mkdir ~/.local/bin
cp the bashmarks.sh file into that directory with the command cp bashmarks.sh ~/.local/bin
Add the code source ~/.local/bin/bashmarks.sh into your bash profile.

So that script will get run every time you open your shell.