Previously the search query used in the command panel
spec returned 500+ matches when the specs needed far
less to verify moving up and down and scrolling.
This reduces the time take to run the command panel spec
by ~2.5 seconds.
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.
We now look at the `core.disabledPackages` config key. Rename the `src/extensions` directory to `src/packages`. The config object now talks about loading packages instead of extensions.
