lilia 886557a2aa Drop chrome.runtime.onMessage events
We can use Backbone.Events instead.

// FREEBIE
..
models Rework expiring messages management
views Rework expiring messages management
Mp3LameEncoder.min.js Add voice notes
WebAudioRecorderMp3.js Add voice notes
background.js Drop chrome.runtime.onMessage events
chromium.js Drop chrome.runtime.onMessage events
components.js Update libphonenumber
conversation_controller.js Ensure that expired messages are removed from the frontend
conversation_panel.js Remove erroneous license file and headers
database.js Rework expiring messages management
debugLog.js Fix minor style errors
delivery_receipts.js Remove spurious update to conversation on delivery receipts
emoji_util.js Fix search tests
expire.js Add build support for expiring old releases
expiring_messages.js Rework expiring messages management
index.js Remove refs to appWindow
libphonenumber-util.js Refactor number parsing and validation
libsignal-protocol-worker.js Update libsignal-protocol v1.0.0
libtextsecure.js Fix key change errors while retrying key change errors
notifications.js Add an option to play audio notifications
options.js Refactor registration event
panel_controller.js Clear window attention if all messages are marked read
read_receipts.js Use read receipt envelope to infer startExpirationTime
register.js Fix minor style errors
registration.js Refactor registration event
rotate_signed_prekey_listener.js Drop chrome.runtime.onMessage events
signal_protocol_store.js Log session deletions
storage.js Log on failure to fetch storage