Doc update

[tdimarzio]

First, outstanding. This saved me so much time, downloading and EXIF-ing thousands of photos from TadPoles spread out over years. Couldn't have been a more perfect fit for my need.
The only thing I ran into was my TadPoles account is linked through Google and not a dedicated email/password combo. I worked around this by creating a new Tadpoles account with a non-gmail address (e.g. comcast.net) and then requesting an account migration from the TadPoles' site to my new account, from my gmail. The migration took a few hours, and appears to have effectively cloned the entire set from my gmail Tadpoles to my comcast Tadpoles account. The data exists in both now. So, this is just a recommendation that you could add something to this effect to the documentation, because I'm sure many others are using gmail / google authentication. Thanks again!