Added examples.

examples/src/main/kotlin/com/example/ReadingTimeExample.kt

@@ -0,0 +1,23 @@
+package com.example
+
+import java.io.File
+import net.thauvin.erik.readingtime.ReadingTime
+import net.thauvin.erik.readingtime.ReadingTime.Companion.imgCount
+import net.thauvin.erik.readingtime.ReadingTime.Companion.wordCount
+
+fun main(args: Array<String>) {
+    if (args.size == 1) {
+        val text = File(args[0])
+        if (text.exists() && text.canRead()) {
+            val rt = ReadingTime(text.readText())
+            rt.postfix = "minute to read"
+            rt.plural = "minutes to read"
+
+            println("It will take ${rt.calcReadingTime()} ${wordCount(rt.text)} words and ${imgCount(rt.text)} images.")
+        } else {
+            System.err.println("The file could not be read or found.")
+        }
+    } else {
+        System.err.println("Please specify a file as an argument.")
+    }
+}