o Give a return code for bare usernames too. Closes: 3405
o Adapt to Soledad 0.2.1 API.
o Fix broken pip install
o Fix alias lookup return codes. Closes: 3356
o Use the new API to import a new ascii armored public key. Fixes
3352.
o Add "incoming" index for ease of listing new email.
o Add dependency for leap.keymanager.
o Adapt to the new keymanager API. Closes 3397.