My Swift extensions

Here are my Swift extensions, as well as changes needed to make Lumberjack more Swift-friendly.
I am fairly certain it is not defined on Xcode 5.

And yes, I will be adding the NS_DESIGNATED_INITIALIZER define very soon.

> On Oct 13, 2014, at 11:46 PM, Ernesto Rivera <notifications@github.com> wrote:
> 
> In Classes/DDFileLogger.h:
> 
> > @@ -210,8 +210,8 @@ extern unsigned long long const kDDDefaultLogFilesDiskQuota;
> >   **/
> >  @interface DDLogFileFormatterDefault : NSObject <DDLogFormatter>
> >  
> > -- (id)init;
> > -- (instancetype)initWithDateFormatter:(NSDateFormatter *)dateFormatter;
> > +- (instancetype)init;
> > +- (instancetype)initWithDateFormatter:(NSDateFormatter *)dateFormatter NS_DESIGNATED_INITIALIZER;
> I think just creating an empty definition when needed would be enough.
> 
> #ifndef NS_DESIGNATED_INITIALIZER
> #define NS_DESIGNATED_INITIALIZER
> #endif
> Not even sure if it is really not defined on Xcode 5.
> 
> —
> Reply to this email directly or view it on GitHub <https://github.com/CocoaLumberjack/CocoaLumberjack/pull/362/files#r18809963>.
>