Added Carthage support

• Added Carthage support

Added Swift 4 support

• Added Swift 4 support
• Added Swift Package Manager support
• Added CHANGELOG.md
• Fixed compilation warnings

Removed XMLDictionary dependency

• Removed XMLDictionary dependency and replaced with Swift code
• Added ReadingOptions in XMLSerialization
• Added documentation in XMLSerialization
• Minor code improvements

Added Requests subspec

• Added Requests subspec for making xml requests with Alamofire
• Added classes for making SOAP request (supports SOAP v1.1 and v1.2)
• Minor code improvements

Added nodeName property in XMLMappable

• Added nodeName property in XMLMappable protocol
• Fixed compiler warnings
• Small improvements

Initial public release v0.1.0

Basic XML mapping