Update to 1.57
    
    - New upstream release 1.57
      - Correct set exchange in YahooJSON.pm (GH#306)
      - Added close, change and p_change to Tradegate, XETRA and Sinvestor; added
        optional parameter INST_ID to specify the institute id; fixed bug in
        Tradegate, XETRA and Sinvestor for numbers equal or higher than 1.000
        (GH#304)
      - Added GoogleWeb module
      - YahooWeb module added (GH#296)
      - Added MarketWatch module
      - Replaced cached file with IO::String object in IndiaMutual.pm
      - Fixed missing date in AEX.pm (GH#298)
      - Fixed Examples in POD Documentation in a few modules (GH#295)
      - Move 'use strict' to be the first statement in TreasuryDirect.pm and
        TwelveData.pm (GH#290)
      - Remove old perl version requirement statements from TreasuryDirect.pm and
        TwelveData.pm (GH#290)
      - Removed Data::Dumper, which caused another test to fail from
        TreasuryDirect.pm (GH#290)
      - Fixed Fool.pm and fool.t (GH#289)