Transitioning to 2.5

[synesthesiam]

Rhasspy 2.5 has been released!

This version is a complete rewrite of 2.4 with these goals in mind (from the history):

• Maintain compatibility with Rhasspy 2.4 profiles and APIs
• Enable contributors to write Rhasspy apps/skills in any language that can speak MQTT and JSON
• Provide a migration path for Snips skill authors to move their Hermes-based services to Rhasspy
• Allow for individual Rhasspy components to be developed independently in separate repositories
• Make modular installations possible, with any combination of individual services

Work going forward will focus on 2.5. When possible, please back up your 2.4 profile and give 2.5 a try. Thanks!