Previously we were relying on the package module itself to have a
`name` field. But now that we're using `atom.loadPackage` to load up
packages, we can infer the name of the module from the name of the
package directory.
Also, add a spec to cover the loading of keymaps in `atom-spec` and
reset the `keymap`'s internal data after each spec gets run to prevent
test pollution with keymaps.
TextMatePackage is only designed to load resources out of a TextMate
bundle. It's used only at load time, and from that point out we only
refer to our own global `syntax` data structure to access the data that
it loads.
The `load` method on the superclass will provide a general template for
loading the package's resource. Each subclass will be responsible for
loading resources in a manner appropriate for the package type. There's
some initial progress on loading TextMate settings as scoped properties,
translating the TextMate scope selectors to CSS-style atom selectors.
