This uses cpu on clients. Worse, it widens the window between pull and
push, which can result in...

checks if "reserve" is less than the available space

asdf

A dummy email address is probably a feature too..

don't reinstall git-annex everytime

don't let filenames get interpreted as command-line args

Probably need to do the same thing elsewhere; any place where a filename
is used as a command-li...

prefer downloading all files in an item together

This makes the item more useful to the user, should they go to take a
look at what they've got.

Fix typo in iabak public key display

The repo, including the key, may move around from time to time.