filter message lists by selected contact
added installation instructions for Tails 1.1xX
Tails docs: replace aliases with wrapper scripts

also removed old Tails 1.0.1 documentation
Tails docs: add persistent aliases, other details
Merge branch 'tails11docs' of git://github.com/leif/pond into leif-tails11docs
Tighten up the <pre> blocks in previous commit.
Merge branch 'leif-tails11docs'
Don't reorder messages in the outgoing queue.

Previously, failed sends would be moved to the end of the queue. If two
messages to the same contact were in the outgoing queue then this would
reorder those messages. In order to make other things (e.g. notification
of missing messages, HMAC sending) easier, this change eliminates that
reordering by moving all messages to the same contact to the end of the
queue (in the same order) when sending fails.
Update server to store time in filename.

In order to reduce (further) the reordering of messages, this change
extends the server to store the delivery in the filename of messages.
Previously the mtime was used, but that only has single-second fidelity.

The server will automatically update old message filenames to the new
scheme at startup.
Merge branch 'contact-filter' of git://github.com/leif/pond into leif-contact-filter
Fix nits in Leif's change.
Merge branch 'leif-contact-filter'
Highlight contacts using old ratchet.

This code will be removed at some point so this change highlights
contacts with whom an old ratchet is being used. In order to ensure that
a contact keeps working, it's neccessary to confirm that the contact is
running an up-to-date version of the client and to perform a new key
exchange with them.