add release tests

Author: mohawk2

MANIFEST.SKIP

@@ -61,3 +61,4 @@ pogl_gl_funcs.txt
 utils/glversion(\.exe|\.o.*|\.txt|)$
 utils/glxinfo.c
 test.png
+^xt/

xt/00-check-changelog.t

@@ -0,0 +1,17 @@
+use Test::More tests => 1;
+
+use strict;
+use warnings;
+
+use CPAN::Changes;
+use Data::Dumper;
+
+my $changes = CPAN::Changes->load('Changes');
+
+ok($changes);
+
+my @releases = map { +{ $_->version => $_->date } } $changes->releases;
+
+note Dumper \@releases;
+
+done_testing;

xt/manifest.t

@@ -0,0 +1,12 @@
+use strict;
+use warnings;
+use Test::More;
+use ExtUtils::Manifest;
+
+unless ( $ENV{RELEASE_TESTING} ) {
+    plan( skip_all => "Author tests not required for installation" );
+}
+plan tests => 2;
+
+is_deeply [ ExtUtils::Manifest::manicheck() ], [], 'missing';
+is_deeply [ ExtUtils::Manifest::filecheck() ], [], 'extra';