Add minil.toml

So I can keep my directory named hashids.pm ;)
Add "canned" tests

Check if object "can" encrypt/decrypt...
Support construction with salt only

Instead of passing in 2 or more args, allow to pass just one for
constructing, to be consistent with other Hashids implementations ;)
Add a thank-you note

Salamat, @jofell!
Checking in changes prior to tagging of version 0.03.

Changelog diff is:

diff --git a/Changes b/Changes
index de0f323..f0aebb1 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,12 @@ Revision history for Perl extension Hashids

 {{$NEXT}}

+0.03 2013-08-20T15:57:59Z
+
+    - Let the construct accept salt string only for consistency with
+      other Hashids implementations
+    - Refactor a really little bit :)
+
 0.02 2013-08-20T10:01:07Z

     - Forgot salt key in SYNOPSIS