Dinodex 20140925 rc

Dinodex project, current incarnation...will yield some rubocop/hound messages.

Basics:
The "main.rb" file brings in data from the files, creates the `Dinodex` object, and performs search operations against it. The `Dinodex` `filter()` method supports chaining. The CSV import is done in a base class, `FileHandler`, while the file-specific mapping is done in two classes: `DinodexFile` and `AfricanFile`. The idea was to easily support future files of various formats.

Notes:
I use a hidden variable, `weight_classification`, to get around having to compare integers and strings. This variable is populated when a `Dinosaur` object is created.
It breaks encapsulation if a dinosaur needs to do know wether it is "big" or "small", not certain why the individual instance would ever need to know anything except it's weight. The logic for big or small should be applied to the class doing the search and sorting.