cli: swap order of inbox and outbox in status

I want to see the inbox more often than the outbox, and a long outbox causes me
to have to scroll up to see the inbox if the inbox is displayed first.
Avoid SafeTempDir with odd permissions.

We actually need rwx permissions, so check for it.
Reverse order of cli global/context help output

Fixes #70
Don't panic on gtkspell errors

gtkspell.New() returns an error if it fails to find a dictionary for the
current locale. Instead of panicing, just print the error to stderr and
continue without the spell checker.

"Fixes" issue #68
Merge branch 'ebfe-tmpdir-perms'
No need to call error.Error() when formatting as a string.
Merge branch 'ebfe-gtkspell-panic'
Merge branch 'ebfe-issue-70'
Add save-key command and fix crash.

Previously if one attempted to download a detachment that wasn't
uploaded then the CLI would crash. This change fixes that and also adds
the save-key command to just save a key to disk. The decrypt utility, in
this repository, can be used to decrypt with the key.
Go 1.0 compat fix.

Fixes #56.
Fix "should-save" logic when deleting expired inbox message.
Add dev server identity file.

When running Pond with POND=dev, the default server is switched to
127.0.0.1 in order to help development. The public key for that
default, dev server is hardcoded in the client source and identity.dev,
in the server directory, is the private key needed for it.
Fix editstate build.

637bac76 added Destruct to disk.NewState.
Add a warning in documentation about using golang 1.0
custom tor address via env variable (closes #19)
Ignore invalid values of POND_TOR_ADDRESS.
Remove superfluous line break.
Merge branch 'kargig-fixdoc'
Merge branch 'ebfe-fix-editstate-build'
Added sendDraft and refactored to use it instead of send.

All interactions with pond.Message from cli.go and gui.go now take place in
network.go.  sendDraft func isolates updating the ratchet.

I believe this should simplify sending messages to multiple recipiants,
and reduce the chances of making mistakes when writing future UIs.

This should also fix a minor hickup in the GUI where, if the user begins
a reply, but deletes the inbox message before replying, then the reply
loses its status as a reply.