Log Message:
Update 2.13 to 2.17
-------------------
2.17 2015-01-23
   - Handle case when the maximum number of items is unknown (LukeGoodsell)

2.16 2014-09-09 17:00:00
   - Cygwin width issue  RT #8344 (LukeGoodsell)
   - Remove unused DEBUG variables.
   - Stop exorting $PACKAGE $VERSION.
   - Add use warnings;

2.15 2014-04-13 23:23:23
    - Add Term::ProgressBar::IO (DON)

2.14 2013-07-21 13:34:52
    - Document the term_width argument to the constructor (OVID)
    - Add a "silent" option to the constructor (OVID)