Merge pull request robcowart#579 from robcowart/4.x-dev

merge 4.0.1 to master

Merge pull request robcowart#574 from robcowart/4.x-dev

ready for 4.0.0 release

update changelog

bump to 3.5.3

update change log

ndjson support

bump to 3.5.0 - add ES 7.x support

Merge pull request robcowart#308 from robcowart/v3.x-dev

merge release v3.4.2

Merge pull request robcowart#265 from robcowart/v3.x-dev

merge v3.4.1

Merge pull request robcowart#258 from robcowart/v3.x-dev

merge v3.4.0 to master