Foursquare default version deprecated and giving a 410 error on a few userless requests

Hi John Cline,

It seems like Foursquare has deprecated the v=20110615 parameter defined on FoursquareApi.DEFAULT_VERSION. 

The weird part about this is because there are a few requests you can make using its last value without any error ( As in fi.foyt.foursquare.api.tests.Venues methods ) but for some userless request it was giving the following error:

    Error occured: 
      code: 410
      type: param_error
      detail: The Foursquare API no longer supports requests that pass in a version v <= 20120609

I figure out a example of a situation where it raises the error as shown below:

    public static void main(String[] args) throws FoursquareApiException {
        FoursquareApi foursquareApi = new FoursquareApi("BKWGJHTTXOVZUACQ3T0FSY5MTCEEQRMISZ10FPQUHITT2K2I", "WCKR1DIW3NE4CKIR41TCJA2KCGXE43GRUWBS0EOBTCBD2OTJ", null);

        Result<VenuesSearchResult> result = foursquareApi.venuesSearch(String.format("%f,%f", -23.557197, -46.747266), null, null, null, null, null, null, null, null, null, null,null,null);

        if (result.getMeta().getCode() == 200) {
            for (CompactVenue compactVenue : result.getResult().getVenues()) {
                System.out.println("Name: " + compactVenue.getName());
                System.out.println("Category: " + categoryResult(compactVenue.getCategories()));
            }
        } else {
            System.out.println("Error occured: ");
            System.out.println("  code: " + result.getMeta().getCode());
            System.out.println("  type: " + result.getMeta().getErrorType());
            System.out.println("  detail: " + result.getMeta().getErrorDetail());

        }
    }

    public static String categoryResult(Category[] categories) {
        String result = "";
        for (Category c : categories) {
            result += c.getName() + ",";
        }
        return result;
    }

Actually by just changing DEFAULT_VERSION to "20140806" it fixes that problem and keep all JUnit tests working as well. 

Best Regards