1. Added support for tool calls for Google Gemini AI models
2. Added support for new Google Gemini 2.0 AI model: gemini-2.0-flash-exp, together with some other experimental Gemini models: gemini-exp-1206, gemini-exp-1121, learnlm-1.5-pro-experimental
3. Added the ability to use any custom OpenAI Compatible API URL instead of
https://api.openai.com
4. Added the ability to add mixed SERP/internal/manual links to the content
5. Fixed all reported bugs
