comments changed
raise added

Just added raise.
issue close #23

+ logic of @extension changed
issue close #21 and close #20, 

+ [fixed] When the file was being copied [FileUtils.cp(@batchLocation, @@destination] if there was a bug before it stopped the program.
+ [fixed] It checks if is being used "/" or "\". #20
Merge pull request #24 from jesusriles/testing

Working great ;)