Prime number feature added to N
Divisors feature added to N class
Opposite and absolute features added to N
Missing UT for absolute feature
Modulo feature added to N
Power feature added to N (cube and square too)
Class N: log and ln features added
Root (and sqrt) feature added to N
Min and max feature for numbers added to A class
Push alais of add method added to A class
Alais to delete method in A class