Bump version to 0.8.0.
Bump version to 0.8.0.

glensc/fpm-cookery,glensc/fpm-cookery,kisoku/fpm-cookery,devkid/fpm-cookery,cas-ei/fpm-cookery,cas-ei/fpm-cookery,ryansch/fpm-cookery,devkid/fpm-cookery,ryansch/fpm-cookery,kisoku/fpm-cookery