issue 42: support git bash

This pull request solves https://github.com/kinkadzs/QuickOpener-NetBeans/issues/42

Starting gitbash works this way
```cmd /c start /D workingDIR "" D:\tools\Git\bin\sh.exe --login -i```

See patch in action

![2014-03-15_16h15_44](https://f.cloud.github.com/assets/1857095/2428653/70b03b4e-ac55-11e3-9f4b-930d5a89a004.png)