add debug for debug log
add logging
not log for testing
logger: split multipule-line
fix
fix: mutate log
split function populate_next_generation
fix: logger use Logger::INFO or ::DEBUG instead of :info,:debug
fix `log': undefined method `split' for #<Gargor::Individual:0x007fdf01911800>
log 出力の調整
fix logger
treat as error when deploy error
progress bar
fix null to nil
Merge branch 'progressbar' into logger
Merge branch 'logger'
add logger documents