I just downloaded sparrow for my iphone because I thought I was going to be able to do something that the native mail app can't do and I am not able to do it. I would like to make my work signature have my company logo in it so when I compose an email from my phone it looks like it is coming from my work computer. I can't figure out how to add the picture. I tried to copy and paste it, but it doesn't work. Any ideas?