Improved Seed file management

[wmburke]

When a seed file is uploaded, it's name should be displayed in the interface.
Clicking on this name should bring up a list of the urls in the file.
There may be some additional capabilities that should go along with this. Let's discuss before working on it.

[sujen1412]

When you upload a file, you will need to perform a lot of error cheking on the back end for the validity of the file.
It is better to have a text box where the user can paste the list and we can parse validate on the client side before sending it to the server.