v3.0.0

This is the first version of the Unleash Go client that properly supports Go Modules. The following is a list of improvements/changes from the current master branch (v2 client).

New API

• A new WaitForReady function that blocks until the features are fetched

Changes

• Using Murmur as the hashing algorithm
• Uses Unleash Server v3 API
• Implemented full client specification test