Feature: Stack traces

[danielsogl]

Following the Console Web Api the stack trace function is missing

function foo() {
  function bar() {
    console.trace();
  }
  bar();
}

foo();

[darekf77]

With ng2-logger you don't need that... just keep good names when you are creating ng2-logger reference eg const log = Log.create('Very precise name or module, component or file').