prepareForShutdown() fixed for correctness regarding what to do with AOF and RDB persistence on exit.

Added a 'runtest' script that is responsible to check if Tcl is available and run the test. This is invoked from Makefile as well.

top level Makefile now just a proxy. Doing make clean inside src now does a full clean including deps, not just Redis source. Thanks to Pieter for the top level Makefile proxy trick.

Minor spelling fixes

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.

The test now gives some more time for Redis to start before of exiting with an error, since starting with valgrind can take a significant amount of time.