Prepend \ before apostrophe

ant build gives this error:
  res/values/strings.xml:104: error: Apostrophe not preceded by \ (in Subfolder? If you're in doubt, leave it blank!)
Merge pull request #3 from aelmahmoudy/master

Prepend \ before apostrophe
* Fixed apostrophe in English string.xml
* Fixed typo in Spanish message
Merge branch 'testing' of https://github.com/lgallard/qBittorrent-Client into testing