Add Bitcoin Trading Signal System with MACD and News Sentiment Analysis

- Implement comprehensive Bitcoin trading signal system
- Add MACD (Moving Average Convergence Divergence) indicator
- Integrate news sentiment analysis from CryptoCompare
- Combine technical analysis with market sentiment
- Generate trading recommendations (Strong Buy, Buy, Hold, Sell, Strong Sell)

Features:
- Real-time Bitcoin price data from Binance and CoinGecko APIs
- Historical data analysis with MACD indicator
- News sentiment analysis with keyword-based scoring
- Weighted signal combination (60% MACD, 40% Sentiment)
- Confidence scoring for each recommendation
- Detailed reasoning for trading signals
- CLI interface with verbose and quick modes

Components:
- data_fetcher.py: Bitcoin price and market data retrieval
- macd_indicator.py: MACD calculation and signal generation
- news_sentiment.py: News analysis and sentiment scoring
- signal_generator.py: Combined signal generation
- bitcoin_trader.py: Main CLI application

Usage:
  python bitcoin_trading/bitcoin_trader.py [--verbose] [--days N] [--quick]

Documentation in bitcoin_trading/README.md

bitcoin_trading/.gitignore

@@ -0,0 +1,39 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+env/
+venv/
+ENV/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Environment
+.env
+.env.local
+
+# OS
+.DS_Store
+Thumbs.db