Merge branch 'release/0.0.1' into develop
Add Reader class and Converters module

The reader class wraps our use of CSV and takes care of calling converters if
any are present for the column being processed.

Also adds some tests and makes the version number check stronger.
Clean up spec descriptions

To make document output prettier.
Update rspec options
Merge branch 'feature/passthrough' into develop
Require version number

Accidentally removed this earlier. Oops.
Add RSpec matchers/shared examples for converters

To make tests read better. Began using them in the existing converters
spec.
Add Integer/Float converters and specs

For converting integers and floats, naturally.
Add Time converter and specs

To read times.
Improve failure message for converter matcher

It helps to know the value produced by code when it differs from the
expected one.
Merge branch 'feature/add_converters' into develop
Add newline to end of .gitignore
Change from `specify` to `it`

Looks better.
Add PersistentSet and spec

For storing sets of existing IDs.
Merge 'feature/add_persistent_set' into develop
Add initial generators and specs
Add documentation, fix style issues

Courtesy rubocop.
Add explicit receiver to calls to `rand`

Because sometimes we have a method named `rand` in the same class and that is
just asking for trouble.
Merge branch 'feature/add_generators' into develop
Add SimpleCov

Enable it during specs by setting the COVERAGE environment variable.