Added a 'cleanParams' method to convert false values to 0 in request paramters -- this keeps the digital signatures consistant on our side and twitter's side. Revised callCurl() to use the Authorization header instead of attacheding it to the query string, which should be reserved for API request parameters, not OAuth stuff.
OAuth header information is now kept in oAuthRequestHeader instead of mixed up with the actually request parameters. Created compileUrlWithParams() for curlCall().