Replace all the static range*() methods with a Range type

[danieldietrich]

• remove range, rangeBy, rangeClosed, rangeClosedBy static factories from all collections, including Iterator
• add Range type, see https://github.com/vavr-io/vavr/blob/range/src/main/java/io/vavr/collection/Range.java
• generate Range type (factory methods and Iterators are very similar)

[sleepytomcat]

According to this message here, io.vavr.Iterable is not going to happen. Also, looking at existing implementation, most of the time .range*() method are implemented through Iterator, like those.

Would it make sense for new Range class to be declared as
public interface Range extends io.vavr.Iterator
?

Updated: actually, public interface Range<T> extends java.lang.Iterable<T> seems to make more sense.