added /bin to gitignore
removed the / after /bin
Revert "added /bin to gitignore"

This reverts commit c4d8ee47649a412893b8ddeda8271caa19bd89a0.
Revert "removed the / after /bin"

This reverts commit 01137b4ffb0bb85cad8bc6c67b768107d427ba8f.