[Node Tools] Minor updates to the command line usage message and to the "p" parameter description
[Node Tools] Minor updates to the command line usage message and to the "p" parameter description

ArchivedRepos/ManifoldJS,f2bo/ManifoldJS-lib,f2bo/ManifoldJS,dragthor/ManifoldJS,beni55/ManifoldJS,maitret/ManifoldJS,f2bo/ManifoldJS-lib,BobJavascript/ManifoldJS,manifoldjs/ManifoldJS,f2bo/ManifoldJS,NoobsArePeople2/ManifoldJS,AuyaJackie/ManifoldJS