Add project for money utils

src/main/kotlin/com/cubetiqs/libra/moneyutils/Main.kt

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+package com.cubetiqs.libra.moneyutils
+
+class Main {
+    fun run() = print("Just mind!")
+}
+
+fun main() {
+    Main().run()
+    val money = Money(10.0)
+    val money2 = Money(20.0)
+    money *= money
+    println((money + money2) * money2)
+}

src/main/kotlin/com/cubetiqs/libra/moneyutils/Money.kt

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+package com.cubetiqs.libra.moneyutils
+
+data class Money(
+    var value: Double,
+    var currency: String = "USD"
+)
+
+operator fun Money.unaryMinus() = (-value)
+operator fun Money.unaryPlus() = (+value)
+operator fun Money.inc() = Money(value++)
+operator fun Money.dec() = Money(value--)
+operator fun Money.plus(other: Money) = Money(value + other.value)
+operator fun Money.times(other: Money) = Money(value * other.value)
+operator fun Money.div(other: Money) = Money(value / other.value)
+operator fun Money.timesAssign(other: Money) {
+    this.value = this.value * other.value
+}
+operator fun Money.not() = this.value != this.value

src/main/kotlin/com/cubetiqs/libra/moneyutils/StdMoney.kt

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+package com.cubetiqs.libra.moneyutils
+
+/**
+ * Default standard money style
+ * We have only value and currency of money
+ */
+interface StdMoney {
+    /**
+     * Get money's value from current state.
+     *
+     * @return Double
+     */
+    fun getValue(): Double
+
+    /**
+     * Get money's currency from current state.
+     */
+    fun getCurrency(): String
+}