Modify output style
Add problem #76
Change BigUint::from_str_radix => FromStrRadix::from_str_radix
Add problem #77
Add problem #78
Add problem #79
Modify problem #77
Follow HashMap#map change
Remove -Z debug=info flag

This flag causes llvm assertion failure
Add problem #80
Add problem #81
Add problem #82
Add problem #83
Follow HashMap#each
Minor fix of output format
Add porblem #84
Add porblem #85
Modify problem #11
Move each_prim_pythagorean to common::calc
Add problem #86