* Update to latest version of go-datadog-api
* Updates to latest go-datadog-api version, which adds more complete
timeboard support.
* Add more complete timeboard support
* Adds in support for missing timeboard fields, so now we can have nice
things like conditional formats and more.
* Document new fields in datadog_timeboard resource
* Add acceptance test for datadog timeboard changes
This new struct avoids requiring to repeat the struct definition in this
code here. It avoids duplication and makes it more flexible so more
options can be added to the struct without breaking the code here.