Advance deps/libapps to get fixes for Chrome dev channel.

See here for details:
https://github.com/rpwoodbu/mosh-chrome/issues/50
Remove dead code around ssh_key handling.
Allow a custom terminal init string to be specified by the user.

This is done in the JS console like so:

chrome.storage.sync.set({"term_init_string": "\x1b[?1005h\x1b[?1002h" }, function() { console.log("ok"); })

On startup, it'll turn on UTF8 mouse support. This is hacky, but allows
experimentation. This item is sync'd with all logged-in Chrome browsers.
Bump version to v0.2.7.29.