Merge pull request #10 from reedog117/master

Added option for keeping newest duplicate based upon creation time
Add @reedog117 to the list of contributors.
only compute header text if we need it
make mail filename available for better debugging
add sanity check for length of canonical headers
Merge pull request #11 from aspiers/canonical-sanity

more robust header extraction
fix breakage when none of -r/-R/-o used

a916246 broke the case where none of the -r/-R/-o options are used.
Merge pull request #12 from aspiers/fix/sorted-messages

fix breakage when none of -r/-R/-o used
Merge pull request #1 from kdeldycke/master

pull to fix bug in determining file sizes for deduplication when using --remove-older-flag