Save `react-property@0.1.0` to package.json dependencies and remove
`react-dom-core`.

Delete `lib/property-config.js` given that the mapping is already
created in `react-property`.

Fix incorrect test since both `ychannelselector` and
`yChannelSelector` are applicable SVG attribute names.

Resolves #107

For HTML DOM attributes that can be either boolean or string,
make sure to convert the value correctly for React.

Add test to confirm `download` attribute is properly converted.

Since the property config is a POJO (Plain Old JavaScript Object),
this means the Object properties/methods are accessible.

Thus, use `hasOwnProperty` to check if the attribute name is on the
config map rather than on the Object prototype chain.

Handle attributes that share the same name as custom attributes.