Version 1.5
- Added toMap(), value(), chain(), eachRight(), and forEachRight()
- Added chain and object methods support for the size() and isEmpty()
- Fixed type for sort() method
- Added support for the chain methods every() and some()
- Added chain methods support groupBy(), indexBy() and countBy()
- Added support for the diferrence(arrays) and union(arrays) methods
- Improved equals and hashCode for Optional