Log Message:
Update to p5-Mail-Mbox-MessageParser-1.20.

Changes since 1.14:
- More robust use of GNU grep to find emails on DOS systems
- Fixed an uninitialized value warning in Cache.pm
- Made everything work with DOS-style line endings.  Added endline() function
  to return the detected line ending
- Now keeps reading the first paragraph until a maximum number of bytes have
  been read.