Rename sub-folders

Lose the Kit component.
Redirect the Kit project to the correct sub-folders
Remove the library target, including its test target
No more need to qualify kit with kit-framework
Remove Kit from source-file names
Remove Kit from headers and header paths
Look for headers and sources without Kit in the pathname
Rename scheme; remove library scheme for kit
Rename Info.plist used for testing
Rename the scheme for the kit, after auto-regeneration
Project for building an iOS static library
Workspace combines both sub-projects
ActiveSupport.xcconfig carries the Apple-generic versioning build settings
Factor out Versioning.xcconfig
Remove shared scheme; rely on auto-generated
Use an Versioning.xcconfig build setting for current marketing version

Also known as bundle short version.
Merge branch 'feature/workspace' into develop