Should be able to upload blobs

[christianbundy]

What's the problem you want solved? We can't upload blobs, which is very inconvenient if you want to upload an image or audio or video and share it on the network like how other clients do it.

Is there a solution you'd like to recommend? The absolute minimum would be adding a 'Blob' page that just lets you upload blobs and get links for them, but once #67 is being worked on it'd be convenient to have it right next to the input.