Update to 1.47
    
    - New upstream release 1.47
      - Drop long-obsolete debian directory
      - AlphaVantage:
        - Added support for .IL ⇒ USD currency and division
        - Graceful error catchup
      - Yahoojson:
        - Module adapted to new URL and returned json
      - Use AlphaVantage for currency quotes instead of Yahoo