Add asyncpg - async PostgreSQL client library

Created by: jmargeta

What is this Python project?

Asyncpg is a fast async client library for PostgreSQL.

What's the difference between this Python project and similar ones?

• built for asyncio and Python 3.5+ async / await
• plays well with the asyncio ecosystem e.g. with Sanic or Gino ORM
• implements PostgreSQL server protocol natively and exposes its features directly
• written almost entirely in Cython
• based on creators' benchmarks
  • faster than alternatives
  • can be approximately 3x faster than alternative Python libraries such as psycopg2 or aiopg
  • achieved query throughput 1M rows/s
  • significantly lower latency

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