Other changes include:
* utils: utilsGenerateFormattedSizeString() now takes an input double instead of size_t.
* DownloadTask: calculated speed is now expressed in bytes per second, so now it's up to the caller to convert it to other units.
* DownloadTask: set download size and percentage if the download size isn't known and we're dealing with the final chunk.
* http: slightly improved CURL error info formatting.
* OptionsTab: fully implemented NSWDB XML update option.
