Beta-0.5.2.8

NOTE: Please run this release with the following environment variable: export GODEBUG="madvdontneed=1"
NOTE: Please use the default config for all options (except unique configurations like moniker, external addr, etc). To get the default config, remove /config/config.json file and then execute a CLI command)

• fixed nil txIndexer bug (Tendermint now sets txindexer and blockstore)
• removed event type and used Tendermint's abci.Event