Add repository URL to GitHub description

git-svn-id: http://plugins.svn.wordpress.org/simplexis-woocommerce-backordered-products/trunk@783395 b8457f37-d9ea-0310-8a92-e5e31aec5664
Initial commit

git-svn-id: http://plugins.svn.wordpress.org/simplexis-woocommerce-backordered-products/trunk@783398 b8457f37-d9ea-0310-8a92-e5e31aec5664
Correct tag in .php file

git-svn-id: http://plugins.svn.wordpress.org/simplexis-woocommerce-backordered-products/trunk@783399 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixing git mistake
Merge branch 'master' of github.com:SimplexIS/Woocommerce-Backordered-Products