Naming of WatchTask(s)

[doublerebel]

PackageTask and PublishTask will both take a name. WatchTask has a fixed name of 'watch'. For better namespacing and versatility, I support naming WatchTasks.

This is a breaking change in syntax. However, WatchTask is relatively young (see: #122), and I searched Github but found no projects that depend on the current WatchTask syntax. I think the change is reasonable since it brings the method arguments more in line with other Tasks.

[cedx]

I think it's a good idea, because it allows us to define several watch tasks (e.g. one for CSS preprocessing, one for JS concatenation, and a last one combining the 2 previous).

Your pull request introduces a breaking change, but it can be avoided by using parameter swapping, like this naive implementation:

if(Array.isArray(name)) {
  definition = taskNames;
  taskNames = name;
  name = 'watch';
}

[mde]

I have no idea how this got dropped. This is absolutely something people have asked for on other occasions. I'll get this fixed up and merged ASAP. :)

[mde]

Merged, thanks!