make sure bundle loading only happens in the main thread.
pursue better user interface that allows plugins to be turned on and off more simply
could be done as a pref pane.
create a particular extension type that would allow SIMBL bundles to be automatically installed without using the main Installer.
FIXED
clean up logging and make it adjustable via a preference
only send the inject event for applications that already match the list of loadable plugins
SIMBLAgent can watch the plugins directory. When new plugins are added, keep a hash of all the bundle identifiers that will result in actually loading a plugin. This keeps us from running a costly inject at every application launch.
better event targeting for the SIMBL Agent
send events based on pid or psn rather than just the name of the application
