Implemented FastLZ compression codec

Motivation:

FastLZ compression codec provides sending and receiving data encoded by fast FastLZ algorithm using block mode.

Modifications:

- Added part of `jfastlz` library which implements FastLZ algorithm. See FastLz class.
- Implemented `FastLzFramedEncoder` which extends `MessageToByteEncoder` and provides compression of outgoing messages.
- Implemented `FastLzFramedDecoder` which extends `ByteToMessageDecoder` and provides uncompression of incoming messages.
- Added integration tests for `FastLzFramedEncoder/Decoder`.

Result:

Full FastLZ compression codec which can compress/uncompress data using FastLZ algorithm.

See issue #2750 for format description and #81.