Git tutorials

http://rogerdudler.github.io/git-guide/ (simple)

https://learnxinyminutes.com/docs/git/ (more complete)

Useful websites

https://blockchain.info/

https://bitcoin.org/en/bitcoin-core/

https://bitcointalk.org/index.php

Queries

https://bitcoincharts.com/about/markets-api/

https://www.bitstamp.net/websocket/

Quandl API

https://www.quandl.com/tools/python

https://www.quandl.com/collections/markets/bitcoin-data

Live examples

https://www.bitstamp.net/s/examples/live_trades.html

https://www.bitstamp.net/s/examples/live_order_book.html

Volume

http://bitcoincharts.com/charts/volumepie/

https://bitcoinity.org/markets/list?currency=ALL&span=24h