Fix group-aggregate query inconsistency

BUG FIX

• Fix #357 group-aggreagate query in backward direction returns
  invalid first/last values

Release docker images

Version 0.8.79

BUG FIX

• Update Docker images on CI

Add 'version' command/endpoint

Version 0.8.78

IMPROVEMENT

• Add --version command line argument
• Add /api/version endpoint

Expression support and bugfixes

Release notes
Version 0.8.77

BUG FIX

Fix #341 aggregate query optimization

Version 0.8.76

IMPROVEMENT

Expression evaluation using muParser library

Group-aggregate-join query support

Fix condition in .travis.yml (#338)

* Fix condition in .travis.yml

* Add debug line

Bind HTTP/TCP/UDP server to specific iface

Version 0.8.73

BUG FIX

• Fix #328 group-by query crash

IMPROVEMENT

• Bind HTTP/TCP/UDP server to specific iface

Fix bulk-transfer protocol encoding

Release notes

Version 0.8.71

BUG FIX

• Fix bulk-transfer encoding

v0.8.69: Merge pull request #314 from akumuli/fix-protocol-parser

Release notes

Version 0.8.69

IMPROVEMENT

• Add --config command line argument

BUG FIX

• Fix framing issue in RESP protocol parser

32-bit support

Release notes

Version 0.8.68

IMPROVEMENT

• Support 32-bit ARM/Intel processors

BUG FIX

• Fix #312 integer overflow in RESP parser
• Prohibit use of WAL with single volume

Decrease memory usage

Up to 50% improvement on large datasets.