Make files searchable on local machine

[connellyw]

With the current system, you have to write the path of the files that you are trying to import. I think that a program like this could benefit from being able to search for a folder and skip the step of having to type every file path out.

[enpuyou]

@connellyw Good feature request. Also make sure you check out #37, I do think the file uploader is closely related to what you have proposed here.