SDK: switch to 2.1.500

Until we can figure out how to install on Ubuntu...

update release notes

make transaction inner tasks use RunContinuationsAsynchronously (Stac…

…kExchange#950)

* make transaction inner tasks use RunContinuationsAsynchronously (for discussion, see issue StackExchange#943); detect RunContinuationsAsynchronously in ResultBox completion, and set directly rather than deferred

version: 2.0

1.2.6: fix bug when targeting cluster on 4.0+

Oh... my... looks like FEATURE_SOCKET_MODE_POLL hasn't been defined f…

…or... a while! This is very bad

1.2.4 deploy

1.2.3 release notes

1.2.2 release notes

1.2.2 release notes