v0.7.0

• Graceful handling of context window exhaustion, including helpful tips.
• Added --message to give GPT that one instruction and then exit after it replies and any edits are performed.
• Added --no-stream to disable streaming GPT responses.
  • Non-streaming responses include token usage info.
  • Enables display of cost info based on OpenAI advertised pricing.
• Coding competence benchmarking tool against suite of programming tasks based on Execism's python repo.
  • https://github.com/exercism/python
• Major refactor in preparation for supporting new function calls api.
• Initial implementation of a function based code editing backend for 3.5.
  • Initial experiments show that using functions makes 3.5 less competent at coding.
• Limit automatic retries when GPT returns a malformed edit response.