Auto merge of #114 - achanda:is_nan, r=hauleth
Auto merge of #114 - achanda:is_nan, r=hauleth

Implement is_nan for the complex type

Also run the associated test

vks/num,DonSheddow/num,jbcrail/num,rust-num/num-traits,rust-num/num-integer,rust-num/num-bigint,jbcrail/num,rust-num/num-traits,koverstreet/num,rust-num/num,rust-num/num-bigint,anchovieshat/num,rust-lang/num,koverstreet/num,DonSheddow/num,rust-num/num,achanda/num,achanda/num,anchovieshat/num,vks/num,rust-num/num-integer,rust-lang/num