Adds network difficulty information when new block notifications are recieved
Adds network difficulty information when new block notifications are recieved

* Ignores duplicate block notifications
* Sends block notifications even for solved blocks

simplecrypto/simplecoin,sigwo/simplecoin_multi,lae/simplemona,simplecrypto/simplecoin,nickgzzjr/simplecoin_multi,simplecrypto/simplecoin,simplecrypto/simplecoin_multi,simplecrypto/simplecoin_multi,lae/simplemona,lae/simplemona,nickgzzjr/simplecoin_multi,sigwo/simplecoin_multi,nickgzzjr/simplecoin_multi,sigwo/simplecoin_multi,simplecrypto/simplecoin_multi,simplecrypto/simplecoin_multi,sigwo/simplecoin_multi,lae/simplemona,nickgzzjr/simplecoin_multi