make "search in" directory default to the project directory, not the current directory

[keredson]

Usually one is looking at a file in a sub-directory, but wants to search their entire project. You can define the project directory as the first parent directory to contain a .git or .hg directory.

[oliver]

Should be possible to do; but I'm not really working on this plugin anymore, so I probably won't implement this. Feel free to send a pull request, though.