Move account token generation to PaymentProcessorActor
Modify PaymentProcessor to fit CQRS style

Add methods to know if an state change should be accepted or not.
Make PaymentProcessorActor persistent
Merge pull request #369 from apoloval/task/about-dialog

Add an about dialog accessible from the Help menu bar
Log okpaymock accepted commands

And fix Akka logging for okpaymock module
Compatibilize persistence and remoting configurations
Improve okpaymock README
Merge pull request #370 from sortega/persistent-okpaymock

Make okpaymock persistent
Improve logging of `OrderBookChart`

It now logs the data update process.
Merge pull request #371 from apoloval/fix/graph-update

Improve logging of `OrderBookChart`
Change datetime format in wallet transactions table

From ISO8601 format (yyyy-MM-ddTHH:mm:ss.SSS) to locale-dependent medium format
(e.g., 31-oct-2014 13:23:49).
Make PersistentEvent derive from Serializable to make it more specific

This way it will have higher priority when Akka is choosing a serializer
Merge pull request #372 from sortega/fix_it

Fix ITs
Add a link in transactions table to open the tx in web browser
Merge pull request #373 from apoloval/task/improve-tx-table

Some improvements on wallet transactions table
Fix order book chart issues with unordered data

The order of data in chart dataset is relevant. The points are drawn
sequentially. If they are unordered, they are wrongly drawn.

This commit fixes this issue by sorting the data before updating the chart.
Merge pull request #374 from apoloval/fix/order-book-graph

Fix order book chart issues with unordered data
Fix a bug in `MarketInfoActor` that causes a fail to retrieve market stats

In `MarketInfoActor`, if some of the pending requests fails twice due to
message gateway is unable to send the message, the request remains in the pool
of pending requests not retrying anymore and preventing any other request to
replace it.

This change configures the request forwarder to retry forever until success.
That fixes the bug.
Merge pull request #375 from apoloval/fix/market-info-retries

Fix a bug in `MarketInfoActor` that causes a fail to retrieve market stats