Update num-macros to rust master
Update num-macros to rust master

DonSheddow/num,rust-num/num-traits,ollie27/rust_num,Emerentius/num,koverstreet/num,rust-num/num-traits,achanda/num,koverstreet/num,rust-num/num-bigint,Ticki/num,vks/num,huonw/num,Gustorn/num,jbcrail/num,rust-num/num-integer,anchovieshat/num,jdm/num,rust-num/num,jbcrail/num,achanda/num,rust-lang/num,DonSheddow/num,hauleth/num,bluss/num,rust-num/num-integer,anchovieshat/num,vks/num,rust-lang/num,rust-num/num-bigint,rust-num/num