Parse Event from a ByteBuffer

[istreeter]

This is part of my drive to reduce how many times we are copying data in memory.

Snowplow apps downstream of Enrich need to parse a TSV line to get an Event. The TSV line enters the app as an array of bytes (or a byte buffer). Until now, we always convert the bytes into a string, and then afterwards parse the string into an Event. But it should be possible to do it in a single step from a byte buffer.