[COLLECTIONS-537] Harmonized signature of functor-related factory methods: collection and array based methods did not have the same generic bounds. Thanks to Frank Jakop.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1648561 13f79535-47bb-0310-9956-ffa450edef68
Adding gitignore file.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1648568 13f79535-47bb-0310-9956-ffa450edef68