feature/issue 59 (#69)

* [issue59] Added Passivation Strategy options and adapted to new TCK tests. Passes with 186/186.
* [issue59] added optional comma in aggregated prototext value; to be inline with the main repository.
* [issue59] aligned with minor differences in *.proto files regarding formatting and small differences like options.

[fix] Backport issues found with #67 (#71)

fix doc links v0.2.1 (#52)

* [fix] fix invalid links.
* [fix] report err on fatal condition.
* [fix] choose new proxy image.

fix/removed devcontainer deploy for now (#45)

* [fix] removing devcontainer for now.

Merge pull request #28 from cloudstateio/fix/go27_stream_cancellation

fixes #27 – remove entity context for a cancelled stream.

Merge pull request #10 from marcellanz/feature/issues6_7_8

feature/issues[6,7,8]