Fix formatting issue in README.
Make package specs work again.

There were some issues with Dir.home and FakeFS.
Add Package.search for finding similarly-named packages.
Clean up Package by adding a #names method.
Refactor Package: move attr-based methods into a module.
Refactor Package: Move download-related stuff into PackageDownloads.
Update documentation of Package#install!
Move #names into PackageAttrs.
Document the download methods.
Suggest alternatives when no packages with a name could be found.
Begin work on an automatic Package generator.
Start to work on generating installer files.
More work on automatic installer.

This code is awful. I need to refactor it, but right now I'm so unsure of what
the final product will be that I'll wait until I can at least download 50
packages before another mod throws a wrench into the whole affair.
Make PackageDownloads more modular.

This will allow external scripts to pass OpenStructs and whatnot to
PackageDownloads, making it easier to download mods.
Add option for downloader to save to cache.
Make package_downloader do something simpler.

Rather than generate installers itself, it'll now just give information to make
package-making easier.
Add a whole bunch of packages.
Merge pull request #261 from ucarion/buncha-packages

Add a buncha packages