Log Message:
Update to 0.18

Upstream changes:
0.18
    - fix RT #117166: unformatted date values can no longer be retrieved, thx to \ 
lherschi

0.17
    - fix RT #139898: missing file from MANIFEST
    - fix RT #127829, #80565, #79016: [Warning] Argument "#N/A" isn't \ 
numeric in int

0.16
    - added GitHub repository
    - fix RT #125112: Update module name in comments and POD
    - improve POD
    - improve kwalitee test