Disabling the COW replacement for fork() temporarily. This appears to fix crashing issues with redis. Also commenting out related unit tests. Replication is broken until COW (or a better fork replacement) is put back in.

The Redis implementation is tested against Tcl implementations of the
same operation. Both fuzzing and testing of specific aspects of the
commands behavior are performed.

Regression test for the main problem causing issue #141. Minor changes/fixes/additions to the test suite itself needed to write the test.

Redis test ports selection made more robust. This prevents the test from hanging if an already bound port is selected but the TCP server listening to it does not cause a protocol error with a Redis client PING. Also base port moved away from the range near to the Redis Cluster gossip ports.

implemented --single, --list-tests. --accurante and --help are now recognized but not actually implemented.

no longer prints testing... but just shows the test when we get the final result from the testing client.

replication test split into three parts in order to improve test execution time. Random fixes and improvements.

Initial implementation of a client-server parallel testing system for Redis in order to speedup execution of the test suite.