Most notably, we do not anymore discard previously signed updates.
Instead, we re-send them and re-send the exact same signature. For that to
work, we had to be careful to re-send rev/sig in the same order, because
that impacts whatever is signed.
NB: this breaks storage serialization backward compatibility
* reworked payment lifecycle
* fixed retry logic (infinite loop in some cases)
* check update signature
* keep track of the list of errors and routes tried
* added support for sending bolt11 payment request in the API
* updated eclair-cli and deleted deprecated TESTING.md (closes#112)
* removed useless application.conf in eclair-node
* now handling CMD_CLOSE in shutdown/negotiating/closing states
* added no-op handlers for FundingLocked and CurrentFeeRate messages
* cleaning up stale announcements on restart
* more informative/less spam logs in Channel
* (gui) Wrapping payment events to display date of event
* Also added controls to item content in cell factory overrides. This
should prevent prevent duplicates as reported in #115
* handle overflow for field 'max-htlc-value-in-flight'
* moved serialization of uint64 to codecs class
* moved constraint check
* fix configuration (was using hard coded values)
* using UInt64.MaxValue in test constants
* added a default handler for 'ok' messages in Channel
* update_add_htlc wire message: swap expiry and payment hash fields
see BOLT 2
* fix accept_channel wire encoding
'min depth' and 'hlc min msat' fields we swapped
* gui: set ip to "unknown" when it has not been set in node announcements
* reduced logging for Reconnect events
* peer is now able to switch transports, in case of undetected disconnection
* now using an exponential backoff retry when reconnecting to peers
* put the arguments of the 'open' http method in the same order as the uri
