Log Message:
Update 0.17 to 0.21
-------------------
$MODULE = "Tie::Cache"; $VERSION = .21; $DATE = '05/19/2014';
+ fixed internal $VERSION number

$MODULE = "Tie::Cache"; $VERSION = .19; $DATE = '02/23/2012';
+ added cleaner ref() checking for data size calculations when
  using a MaxBytes cache, to address bug
   https://rt.cpan.org/Public/Bug/Display.html?id=69976
+ updated test.pl to "use Tie::Cache" to prevent test conflicts with \ 
Cache.pm