CONTRIBUTING.md testing instructions

[dgpetrie]

In CONTRIBUTING.md:
4. Build the entire library:
It referes to tests:
./bin/subscriber
./bin/client

Pardon, my ignorance if I missed something as I am a bit of a cmake newbie. I am not seeing any rules to build these targets.

[appkins]

In the CMake file, there is the following:

if (BUILD_EXAMPLES)
	add_subdirectory(examples)
	# Reset variable to false to ensure tacopie does no build examples
	set(BUILD_EXAMPLES false)
endif (BUILD_EXAMPLES)

Just pass -DBUILD_EXAMPLES=ON as a cmake param to build the examples.

It's worth noting that we can make BUILD_EXAMPLES an option that can be tweaked using the cmake GUI. I'm happy to introduce these changes if the community prefers cache variables.

[dgpetrie]

Thank you for the update on the build instructions.
Sorry, if I am missing something, but that still does not produce:
./bin/subscriber
./bin/client

It does produce:
bin/cpp_redis_client
bin/cpp_redis_future_client
bin/cpp_redis_kill
bin/cpp_redis_streams_client
bin/cpp_redis_consumer
bin/cpp_redis_high_availability_client
bin/cpp_redis_logger
bin/cpp_redis_subscriber