Can't list project commits

Hi everyone,

found Gitective awesome but could not see any examples of how to basically list all commits (with no filter at all) of a project.

``` java
File project = new File("/Users/rodrigovieira/Desktop/groundhog.git");
String path = project.getAbsolutePath();

CommitFinder finder = new CommitFinder(path);
```

I just want to get all commit messages from the project. How could I do that?
