Add #delete_blanks and #delete_nils to Array
Add #delete_blank_paths
Add tests for #delete_blank_paths
Add Array#find_path
Add Hash#find_path
Switch to returning [k] instead of Array(k)
Add specs with nil keys and Array keys
If a key is an Array it must be passed in an Array of keys
Update tests to show that #delete_blank_paths supports chaining
Refactor #find_path into a shared method
Merge pull request #8 from brandondunne/add_find_path_and_delete_blank_path

Add #find_path and #delete_blank_path