Auto merge of #246 - cuviper:complex-eq, r=hauleth
Auto merge of #246 - cuviper:complex-eq, r=hauleth

complex: derive Eq

Fixes #245.

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