http://rogerdudler.github.io/git-guide/ (simple)
https://learnxinyminutes.com/docs/git/ (more complete)
https://bitcoin.org/en/bitcoin-core/
https://bitcointalk.org/index.php
https://bitcoincharts.com/about/markets-api/
https://www.bitstamp.net/websocket/
https://www.quandl.com/tools/python
https://www.quandl.com/collections/markets/bitcoin-data
https://www.bitstamp.net/s/examples/live_trades.html
https://www.bitstamp.net/s/examples/live_order_book.html