The goal is that `loadPackage` will be the go-to place for loading all kinds of resources out of directories. `requireExtension` was only designed to load and activate extension modules.
The `config` object no longer stores config properties directly. Instead it stores them on an internal `settings` object, which makes it easier to serialize settings without getting them mixed up with non-setting state on the `config` object.
This replaces the old functionality of ensuring no files or directories have subscriptions in javascript. We allow this now, but we just don't allow leaked watches at the native layer.
Path watching resumes once the file is saved again. This commit allows files to be created for as-yet nonexistent paths. We won't call `$native.watchPath` until we have at least 1 subscription to the file in JS and the file exists on disk.
Also, we moved execution of the path watcher callbacks until after the callbacks data structure is updated in order to avoid confusing behavior in specs.
I added overflow hidden on the html and body tags in a previous commit to prevent rubber banding when scrolling the editor. But it broke the ability to scroll specs. This fixes that.
When we actually want to attach the root view in window-bootstrap.coffee, we call `window.attachRootView(path)` instead of calling `window.startup(path)`. Having `startup` called automatically means we can be sure any code we add there runs in every environment (including benchmark and specs). This is where we do things like setup the global keymap, parse text mate bundles and themes, and establish the window close handler. Any globals other than the root view that we want to be available in all environments should be established here. Right now that's just the keymap, but soon I want to add a global pasteboard.
Flexbox was causing layouts and repaints to cover the entire scroll view instead of just the edited line. This cuts down on DOM manipulation cost significantly.
We do this to ensure that the lines aren't longer than the scroll view if they don't have to be. We really should use min-width instead because it's automatic. Also, trigger window resize when we make the editor narrower.
