The function will start the CQP server by way of a system call to cqpserver.
startServer(registryDir = Sys.getenv("CORPUS_REGISTRY"),
initFile = system.file("init", "cqpserver.init", package = "cqi"),
debugMode = TRUE, exec = TRUE)
path to the registry directory
path to the init file required by cqpserver
logical, whether to run debug mode
logical, whether to start the server right away, or return a command that can be run in the shall