+ Cleanup automagically generated Swift files.

+ Document what @UIApplicationMain appears to do.

-- daf
+ Introduce a dummy function and test simple declarations of
  constants and variables.

+ Test declarations of arrays and dictionaries.

-- daf
+ Test optionals.

+ Test switches.

-- daf
+ Test loops.

+ Test "where" cases.

-- daf
+ Test tuples, functions and lambdas.

-- daf
+ More lambda tests.

-- daf