1.2.2 Dual licensed MIT / Public Domain

Release 1.2.2 is a long awaited clean-up of the project.

• Added Unit tests to confirm proper RFC implementation.
• Dual licensed with the original Public Domain and newly added MIT License.
• Removed old deprecated macOS application, keeping only the actual library
• Added Swift usage instructions

1.2.0 Merged community contributions

Merge pull request #25 from tophatmonocle/distribution/swift_package_…

NSUInteger overflow checks

1.1.2

NSUInteger overflow check

Added "Web Safe" URL encoding support

Added NSString methods:
+(NSString *)stringFromBase64UrlEncodedString:(NSString *)base64UrlEncodedString;
-(NSString *)base64UrlEncodedString;

Added NSData methods:
+(NSData *)dataWithBase64UrlEncodedString:(NSString *)base64UrlEncodedString;
-(NSString *)base64UrlEncodedString;

Added MF_Base64Codec utilities:
+(NSString *)base64UrlEncodedStringFromBase64String:(NSString *)base64String;
+(NSString *)base64StringFromBase64UrlEncodedString:(NSString *)base64UrlEncodedString;