Merge pull request #289 from sortega/make_it_compile

Have just one version of netty in the classpath
Close the blockstore on BitcoinPeerActorStop
Style fix on BitcoinPeerActor
Merge pull request #290 from sortega/exit

Close blockstore on BitcoinPeerActorStop
Make okpay ws client not prevent application exit

Address the case of not having any running request to OKPay when
application tries to be exited.
Fix bitcoinj preventing application exit

There is a thread pool at FullPrunedBlockChain that is not stopped by
bitcoinj itself. This will hopefully fixed in upcoming library versions
and the temporal workaround is to access the field using reflection and
shutting down properly.
Style fixes on CoinffeinePeerActor

configProvider.messageGatewaySettings should have parens now that it
can return a different (fresher) version of the settings each time.
Merge pull request #292 from sortega/issue/73_tratadepararlocarlos

Make the application to gracefully close