Adding FPLibrary+iOS category and making FPLibrary sharable.
Adding default FPConfig -imageUploadPreprocessorBlock implementation on iOS.
Adding FPUtils+Mac category with +presentError:withMessageText:
Renaming FPFileTransferWindowController to FPFileTransferController.
Adding FPFileDownloadController and FPFileUploadController inheriting from FPFileTransferController.
Cleaning up FPLibrary and forward declaring some symbols in FPTypedefs.h.
Cleaning up protocols in FPExternalHeaders.h, etc.
More consistency renames in protocols.
Adding FPSaveController and related xib.
Updating Mac demo.
Updating iOS demo.