Changelog and version number for v1.9.1

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@793497 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version 1.9.1

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@793499 b8457f37-d9ea-0310-8a92-e5e31aec5664
Change spacing around colons in the details view to no space before colon and one space after.

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@793970 b8457f37-d9ea-0310-8a92-e5e31aec5664