- added task and tests

README.md

build.sbt

src/main/scala/Main.scala

src/main/scala/solution/Account.scala

src/main/scala/solution/Actor.scala

src/main/scala/solution/Bank.scala

src/main/scala/solution/Behavior.scala

src/main/scala/solution/Navigation.scala

src/main/scala/solution/Person.scala

src/main/scala/solution/Sensor.scala

src/main/scala/solution/Transaction.scala

src/main/scala/task/Accountable.scala

src/main/scala/task/Currency.scala

src/main/scala/task/Decreasable.scala

src/main/scala/task/Increasable.scala

src/main/scala/task/Result.scala

src/test/scala/BankTests.scala

src/test/scala/RobotTests.scala