Method Calendar.TimeRanges.TimeRange()->_equal()

Method `==
Method _equal

bool res = Calendar.TimeRanges.TimeRange() == compared_to
bool equal(Calendar.TimeRanges.TimeRange from, TimeRange compared_to)

Description

These two overloads the operator `== and the result of the equal function.

a==b is considered true if the two timeranges are of the same type, have the same rules (language, timezone, etc) and are the same timerange.

equal(a,b) are considered true if a and b are the same timerange, exactly the same as the equals method.

The __hash method is also present, to make timeranges possible to use as keys in mappings.

known bugs: _equal is not currently possible to overload, due to weird bugs, so equal uses `== for now.