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/__init__.py

@@ -0,0 +1,26 @@
+"""
+Bitcoin Trading Signal System
+Ein System zur Generierung von Kauf-/Verkaufsempfehlungen für Bitcoin
+basierend auf MACD-Indikatoren und News-Sentiment-Analyse
+"""
+
+__version__ = "1.0.0"
+__author__ = "Bitcoin Trading Signal System"
+
+from .data_fetcher import BitcoinDataFetcher
+from .macd_indicator import MACDIndicator, MACDSignal
+from .news_sentiment import NewsSentimentAnalyzer, SentimentScore
+from .signal_generator import SignalGenerator, TradingAction, TradingSignal
+from .bitcoin_trader import BitcoinTrader
+
+__all__ = [
+    'BitcoinDataFetcher',
+    'MACDIndicator',
+    'MACDSignal',
+    'NewsSentimentAnalyzer',
+    'SentimentScore',
+    'SignalGenerator',
+    'TradingAction',
+    'TradingSignal',
+    'BitcoinTrader',
+]