* Change TaskQuery struct parameters to optional
* Thrift API is modified to make all the parameters in the
TaskQuery struct optional
* Autogenerated code is regenerated
* Changes in TaskQuery structs used in the project
* Now that TaskQuery receive optional values, pointers
instead of values must be passed to the struct
* Adding a Pull request template to serve as a reminder of what
to do before creating the pull request.
* Updating our thrift API to match changes made by Aurora.
* Update go bindings to match update thrift API.
Added new monitors for watching number of instances get to a certain count using polling.
Added new commands to sample client which give some statistics.
