Skeleton code and sanity specs for homework 1

The skeleton code for parts 1-7 are located in skeleton_code/.

To run the sanity specs, please make sure rspec is installed. To install rspec, run gem install rspec. If you have your solution saved to a file located at path/to/solution.rb, and the corresponding spec is located at other_path/to/sanity_spec.rb, then you can run the sanity spec with:

rspec path/to/solution.rb other_path/to/sanity_spec.rb

The output should look something like:

...

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3 examples, 0 failures