print logs to STDOUT except errors. Fix #272
print Usage to STDOUT rather than STDERR.
Add test for exit code
Swap STDOUT/STDERR
Merge pull request #290 from miyagawa/stdout-log

Log messages to STDOUT
Fix bug in expiring messaging. Fix #277
Deprecate --scandeps
upgrade Parse::CPAN::Meta
1.6926
Add --cpanfile option to specify cpanfile path
Apparently needs -L in this option
1.6927