v2.2.2.0

This brings Ritocoin up to date with Ravencoin's 2.2.2 release. Improvements include greatly reduced memory usage and faster performance. Asset indexing is now disabled by default. If you want to index all assets in the chain, add 'assetindex=1' to your rito.conf file. If your assets are not present when you first load the wallet, please close and restart it and they should then appear.