0.8.2 Fixed bug in Http code that leaked Netty buffers

Fixed bug in Http code that leaked Netty buffers.

0.8.1 Fixed Snappy bug when sending batches larger than 32kb

#26 - Fixed bug caused by Snappy class from Netty being able to compress max 32kb of data. Now it is called multiple times but since it appends uncompressed data size at the beginning I had to copy the class contents and remove that (we only need it once).

0.8 A lot of improvements and bug fixes

In this release we introduced:

• #8 Improvements in Netty pipeline.
• #9 User configurable log level label name.
• #7 Monitoring of processing statistics (and example of how to export them via Dropwizard metrics).
• #18, #15 Additional validity checks on labels.
• #21 Better send logic. Introduced logic similar to promtail that will send logs when they reach some critical size or timeout is reached.
• #23 Static labels defined at start of the logging system (e.g. in log4j2 configuration) never change. We now serialize them at startup and reuse the resulting string.