Project-Based Configuration/Watching

This version completely ignores any pre-project-based configuration file.  All configuration and watching is project-centric.  As projects are opened/closed, they will appear/disappear from the XcodeScriptWriter window and their watches (if any) will be added/removed.  If watches are added to a project, a file named `[project name].XcSW.plist` will be created alongside the project file-bundle to contain the watch data, and paths for anything inside that containing directory are stored as relative to that directory.  Also, each `VOKProjectContainer` object has its own `VOKDirectoryWatcher` object, so the shared instance of that isn't really used anymore.

Because of the big change and breaking compatibility with existing configuration, I've bumped the version number to 0.1.0.

Also, `README.md` and screenshots probably need to be updated...
Simplicity—whenever anything about the current watch is supposed to change, stop watching, make the change, start watching.  Otherwise, there'd need to be more logic to determine what things to start and stop for which operations.