make retry_time configurable, add doc (microsoft#53)

* make retry_time configurable, add doc

* in seconds

* retry_wait_time

* bump version to 0.1.4

* remove .json

* rename

* time

Fix typo in README.md (microsoft#37)

functionalites -> functionalities

Merge branch 'main' of https://github.com/microsoft/autogen

cleanup

cleanup

cleanup

cleanup