Started the kotlin track

kotlin/leap/.gradle/buildOutputCleanup/cache.properties

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+#Thu Jun 21 08:46:17 CDT 2018
+gradle.version=4.8

kotlin/leap/README.md

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+# Leap
+
+Given a year, report if it is a leap year.
+
+The tricky thing here is that a leap year in the Gregorian calendar occurs:
+
+```text
+on every year that is evenly divisible by 4
+  except every year that is evenly divisible by 100
+    unless the year is also evenly divisible by 400
+```
+
+For example, 1997 is not a leap year, but 1996 is.  1900 is not a leap
+year, but 2000 is.
+
+If your language provides a method in the standard library that does
+this look-up, pretend it doesn't exist and implement it yourself.
+
+## Notes
+
+Though our exercise adopts some very simple rules, there is more to
+learn!
+
+For a delightful, four minute explanation of the whole leap year
+phenomenon, go watch [this youtube video][video].
+
+[video]: http://www.youtube.com/watch?v=xX96xng7sAE
+
+
+
+## Source
+
+JavaRanch Cattle Drive, exercise 3 [http://www.javaranch.com/leap.jsp](http://www.javaranch.com/leap.jsp)
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

kotlin/leap/build.gradle

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+buildscript {
+  ext.kotlin_version = '1.2.40'
+  repositories {
+    mavenCentral()
+  }
+  dependencies {
+    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+  }
+}
+
+apply plugin: 'kotlin'
+
+repositories {
+  mavenCentral()
+}
+
+dependencies {
+  compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+
+  testCompile 'junit:junit:4.12'
+  testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
+}
+test {
+  testLogging {
+    exceptionFormat = 'full'
+    events = ["passed", "failed", "skipped"]
+  }
+}

kotlin/leap/build/kotlin-build/version.txt

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+11001

kotlin/leap/build/kotlin/compileKotlin/data-container-format-version.txt

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+2011001

kotlin/leap/build/kotlin/compileKotlin/format-version.txt

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+8011001

kotlin/leap/build/kotlin/compileKotlin/gradle-format-version.txt

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+4011001