Merge pull request datafuselabs#754 from drmingdrmer/release-0.7

Doc: update change-log for 0.7.6

Doc: add change-log for 0.8.3

Doc: add change log 0.8.2

Doc: update change log 0.8.1

Fixdoc: update README for store examples; fix memstore path

Doc: update change log for 0.7.5

Doc: update change log for 0.7.3..0.7.4

Doc: update change log for 0.7.2..0.7.3

Doc: update change log for 0.7.2

Merge pull request datafuselabs#545 from drmingdrmer/release-0.6

Release 0.6.9