* Ported all code from Thrift 0.9.3 to Thrift 0.12.0 while backporting some fixes from gorealis v2
* Removing git.apache.org dependency from Vendor folder as this dependency has migrated to github.
* Adding github.com thrift dependency back but now it points to github.com
* Removing unnecessary files from Thrift Vendor folder and adding them to .gitignore.
* Updating dep dependencies to include Thrift 0.12.0 from github.com
* Adding changelog.
* End to end tests: Adding coverage for killinstances.
* End to end tests: Deleting instances after partition policy recovers them.
* End to end tests: Adding more coverage to the realis API.
* End to end tests: Allowing arguments to be passed to runTestMac so that '-run <test name>' can be passed in.
* End to end tests: Reducing the resources used by CreateJob test.
* End to end tests: Adding coverage for Pause and Resume update.
* End to end tests: Removed checks for Aurora_OK response as that should always be handled by the error returned by the API. Changed names to be less verbose and repetitive.
* End to end tests: Reducing watch time for instance running when creating service for reducing time it takes to run end to end test.
* Making abort job synchronous to avoid scenarios where kill is received before job update lock is released.
* Adding missing cases for terminal update statues to JobUpdate monitor.
* Monitors now return errors which provide context through behavior.
* Adding notes to the doc explaining what happens when AbortJob times out.
* Fixing possible race condition when passing backoff around as a pointer.
* Adding a debug logger that is turned off by default. If debug is turned on, but a logger has not been assigned, a default logger that will print to STDOUT will be created.
* Making Mutex a pointer so that there's no chance it can accidentally be copied.
* Removing a leftover helper function from before we changed how we configured the client.
* Minor changes to demonstrate how a logger can be used in conjunction to debug mode in the sample client.
* Code cleanup: Deleted multiple functions which have become stale. Removed cluster example as we replaced the need to create the Cluster object.
* Cleaned up ZK connection code by using the backoff function. Added a test to the end to end to test that we're getting the host correctly from ZK. Changed clusters test to be an outside package.
* Added LeaderFromZKURL test to end to end tests.
* Added logger to realisConfig so that users can attach their own Loggers to the client. Logger is an interface that shadows most popular logging libraries. Only Print, Println, and Printf are needed to be a realis.Logger type. Example in the client uses the std library log.
* Moved most fmt.Print* calls to be redirected to user provided logger. Logger by default is a no-op logger.
* Adding CreateService to realis interface. Uses the StartJobUpdate API to create services instead of the createJobs API.
* Bumping up version number inside client in anticipation of new release.
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.
Added the ability to kill and restart specific instances.
Fixed incorrect documentation on using-the-sample-client.
Added helper functions under the response package to extract fields from
aurora.Response.
