String+Localizable.swift

public extension String {
  public func localize(tableName tableName: String? = nil, bundle: NSBundle = NSBundle.mainBundle(), comment: String = "") -> String {
    return NSLocalizedString(
      self,
      tableName: tableName,
      bundle: bundle,
      value: "",
      comment: comment)
  }
}

String extension to allow for a cleaner use of localized strings.
Usage:

"MENU".localize()
"MENU".localize(comment: "Menu title")

Or if you have other Localizable.strings files:

"MENU".localize(tableName: "SomeOtherLocalizable")

Or if you are in a different target:

"MENU".localize(tableName: "SomeOtherLocalizableAndTarget", bundle: NSBundle(forClass: DummyClass.self))
...
private class DummyClass { }