Tests - workaround problem with perl 5.8.x, Test::Deep and regexps
Don't skip tests related to non-UTF data in filesystem under MidnightBSD
Don't skip tests related to non-UTF data in filesystem under Solaris
Tests - Emulate MIME::Base64::encode_base64url in tests (some cpan testers refuse to install new version of this module)
Finaly define minimal perl version as 5.8.8
Cpan Tests  - disallow Win32 for spantesters
CPAN testers - fix tests, so each one use own temporary directory

This will prevent problems when  several copies of testsuite ran
in parallel on same box
CPAN testers - list even core modules in Build.PL
CPAN testers - minimal POD added to MtAws.pm