adelevie/parse-ruby-client — pull request #149 by shzero5 (2014-10-27 03:23:55+00:00)
Title: add deleting files method

Usage:
```ruby
Parse.init :application_id => "",
:api_key => "",
:master_key => "",
:quiet => true | false

photo = Parse::File.new({
:parse_filename => "parse_filename.jpg"
})
photo.delete
```

I didn't add testing code, because I have no idea about testing code.
If you access photo.url, you can see "Access Denied".
But I seem that we cannot test using instance variables of File class.

Would you give me some advice please?