Expose dependency should be emphasized when downloading Overlay

[alibby251]

Edit

Just came across an issue where I only wanted the Overlay plugin, so I selected only that checkbox when downloading. I tried using the "mask" option, and it wouldn't work. When looking into the code, I saw that the Overlay code makes an attempt to call $(overlay).expose(maskConf);. So, went and downloaded a package that included just Expose and Overlay, and now it works. This process could be made easier somehow.