Proper handling of header documentation comments [Mar 10]

At Swiftify, we realize that not only does the compilable code matter to our users, but the precise preservation of comments is also very important.

Since today's release, we have considerably improved the handling of documentation comments according to the Google Swift Style Guide.

• Objective-C header documentation comments are converted to Swift triple-slash comments.
• Most common tags that represent parameters and return types are converted to the Swift format, recognized by Xcode.
• Comments from header and source files are properly merged to the Swift output.