- Sending money
- Sending certification
- Sending membership

To be tested...

Identities are now refreshing correctly

- Transactions order by date was not correct ( issue #123 )
- From transactions tab, the transfers dialog call was wrong

- Dates change working again
- Fastening a little bit the refresh of this tab

- Displaying network quality in status bar
- Network crawling now triggers when a new block is mined
- Blockchain watching only refresh caches when the network
crawler detects a new block

Added debug traces in network crawling
Better handling of saving and loading of network cache
Added "synced_nodes" property