1.0.0-beta.3

Added:

• Added support for Lua 5.2, and Lua 5.3.
• Added featureStoreBackend option to configuration object.
• Added launchdarkly_server_sdk_redis module to support Redis as an external feature store.
• Added registerLogger which allows configuration of SDK logging capabilities.

Changed:

• The SDK is now implemented as a compiled C module instead of directly in Lua.
• The SDK is now imported as launchdarkly_server_sdk, instead of launchdarkly-server-sdk.lua.
• The SDK no longer depends on the Lua cjson, or Lua ffi libraries.
• All methods are no longer closures. Use client:aFunction, instead of client.aFunction.