Feature Request: Ensure application icons are specified correctly in Xcode project

[cgrindel]

The benefit is that Xcode will use the icons in its user interface (e.g., schemes).

Tasks

• [x] #932
• [x] #966
• [x] Fix issues when there are multiple Info.plist for a single target: #985
• [ ] Update the BwB app icon selection to use information in the Contents.json for the resource set.

[brentleyjones]

I don't believe this should block 1.0.