title: Xcode Localizable.string multiple targets issue
body: <p>I have a project with multiple targets, which represent the same app just with different styling and translations. </p>
  
  <p>Since almost whole project looks the same for each target, I need to have just few strings in <code>Localizable.strings</code> file, that I need to be different. And I don't want to copy whole huge <code>Localizable.strings</code> file to each project just because of the fact it has few lines different.</p>
  
  <p>It is required for me to have just 1 strings file because of third-party libraries/SDK that are included in project. So I cannot use <code>tableName</code> for <code>localizedString</code>.</p>
  
  <p>The <strong>problem</strong> is - I need to have a flexible possibility to override just few lines from <code>Localizable.strings</code> for each target separately. And I don't like the idea just to copy whole file to each target, cause it will lead to annoying flow in the future, in case I will have 10 targets and I need to add 1 string to all of them.</p>
  
  <p>The <strong>goal</strong> is to have 1 huge <code>Localizable.strings</code> file with all strings included, that would be common for all targets, and have small configuration for each target for the strings that should tell different. So target's file should kinda merge and override the one that is common.</p>
  
  <p>AFAIK it is not natively supported by Xcode, so I'm probably looking for a script that would make it works.</p>
  
  <p>So, script should look into common and target's Localizable files, merge them, and in case some keys are defined in both, then it should use the one from target's file.</p>
  
  <p>Can anyone help me with such script?</p>
  
  <hr>
  
  <p>P.S. Similar issue exists with <code>.xcassets</code>, and CocoaPods solves it by merging multiple assets into 1, and it works as expected - if some targets has an asset containing the image with the same name that is already included into a common asset, then the one from target will replace it. </p>
  
  <p>P.S.2. Similar feature is natively supported for Android devs - each image, each translations can be overridden by "child" flawor, or whatever it is called :)</p>