Unless you've been living on Mars (lucky you ) cut off from all forms of communication, you've heard of a new programming language, named Kotlin, that is considered the heir apparent to Java.Developed and perfected over a five-year period by JetBrains (the company behind IntelliJ IDEA), Kotlin has taken the Java development community by storm. The new language is described as "concise," "safe," and "100% interoperable" with Java, and it runs on the...