Fix: Junk folders created for patch file

```
atomatigit
├── keymaps
├── lib
├── LICENSE.md
├── menus
├── node_modules
├── package.json
├── README.md
├── spec
└── stylesheets
atomatigit.git
└── atomatigit_diff_patch
```

This is not supposed to happen. I rebased upon my PR #24 since I'm too lazy to add `git.getPath()` again. :dancer: 

Relevant to this PR is only a60f4088160e6b32b4ce0630ab7d20bceb6bd200.