croakf and croakff are enabled on any log level
update docs
Checking in changes prior to tagging of version 0.18.

Changelog diff is:

diff --git a/Changes b/Changes
index d94607b..d988332 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension Log::Minimal

 {{$NEXT}}

+0.18 2014-03-12T07:51:14Z
+
+        - bug fix. croakf and croakff did not die on log level = NONE
+
 0.17 2013-12-20T07:48:02Z

         - fix $Data::Dumper::{SortKeys => Sortkeys}