Rename nodeModulesDir?

[bsautel]

When I was answering to #98, I realized that the nodeModulesDir's property name can be confusing. It can let us think that this is the path of the node_modules directory whereas it is the path of the directory containing the node_modules directory. It also contains the package.json directory.

I think that we should rename it before we release the 3.0 version, if we do it later, we will have to support both the new name and the former name. What about nodeProjectDir?

[deepy]

Sounds great, but if we rename it we should add deprecated getter/setter for the old attribute so that a warning is triggered and the upgrade is less painful

[bsautel]

Ok, thanks, I am going to do that.

[anapsix]

FYI: using version 2.2.4, when using nodeProjectDir instead of nodeModulesDir I'm getting an error

A problem occurred evaluating script.
> Could not set unknown property 'nodeProjectDir' for extension 'node' of type com.moowork.gradle.node.NodeExtension.

[bsautel]

This change was done in the 3.0 version that is not yet released. In the 2.2.4 version, the property to use is nodeModulesDir.