Update README.

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README.md

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 - Command pipelining on single and aggregated connections.
 - Transparent key prefixing strategy capable of handling any command known that has keys in its arguments.
 - Abstraction for Redis transactions (Redis >= 2.0) with support for CAS operations (Redis >= 2.2).
+- Abstraction for Lua scripting (Redis >= 2.6) is able to switch between EVAL and EVALSHA transparently.
 - Connections to Redis instances are automatically and lazily estabilished upon the first call to a command.
 - Ability to connect to Redis using TCP/IP or UNIX domain sockets with support for persistent connections.
 - Ability to use alternative connection classes to use different types of network or protocol backends.