New Features

bumped the protocol version
added an option to turn on "invariant checks". These are conditions that if they ever occur mean there is a bug in the protocol or a widespread implementation so the network should halt until they can be fixed. This replaces PARANOID_MODE in the .cfg. It allows you to have stellar core check that the lumen balance in the system is correct and a few other things. (more info)[https://github.com/stellar/stellar-core/blob/master/docs/stellar-core_example.cfg#L233]. It is recommended you run stellar-core with these set to "true" until the load of the checks becomes an issue.
more extensive tests
add --base64 command line option
add --priv2pub command line option

Fixes

hide database password from log
fixed several issues with how account data was cached for multiple operations during a single transaction
fix multiple merge issue that could generate lumens
fix issues with path payment that could destroy lumens
fix inflation bug that would calculate the wrong amount under rare circumstances